IN: Bloc Party are an English rock band, currently composed of Kele Okereke (lead vocals, rhythm guitar, keyboards, sampler), Russell Lissack (lead guitar, keyboards), Justin Harris (bass guitar, keyboards, saxophones, backing vocals) and Louise Bartle (drums, percussion). Former members Matt Tong and Gordon Moakes left the band in 2013 and 2015 respectively. Their brand of music, whilst rooted in rock, retains elements of other genres such as electronica and house music. The band was formed at the 1999 Reading Festival by Okereke and Lissack.

Bloc Party's second album, A Weekend in the City, was produced by Garret "Jacknife" Lee. It was released in February 2007, although it was leaked in November 2006. It became available for download on the UK iTunes Store before the physical release, and reached the number 2 spot on the UK Albums Chart. The album also reached number 2 on the Australian and Belgian charts, and debuted at number 12 in the Billboard 200, with 48,000 copies sold. The first single, "The Prayer", was released on 29 January, and became the band's highest charting single in the British Top 40, reaching number 4. In the buildup to the release of the album, BBC Radio 1 DJ Zane Lowe aired a live set by the band from Maida Vale studios on 30 January 2007, featuring a mix of old and new songs. On 1 February 2007, A Weekend in the City was made available to listen to for free through Bloc Party's official MySpace page.  The next single, "I Still Remember", was Bloc Party's highest charting American single, peaking at number 24 on the Modern Rock Chart. The band released their third single, "Hunting for Witches", with an accompanying video clip in August 2007. The single became their only ARIA Chart entry, peaking at number 20. In October 2007, it was announced that Bloc Party would release a new single, "Flux", on 13 November--ahead of their end of year gigs. The electronic song, also produced by Jacknife Lee, was very different from previous singles released by the band.  The band's first gig following the release of A Weekend in the City was on 5 February 2007, in Reading, and was broadcast live on BBC 6 Music. On 20 May 2007, Bloc Party headlined on the In New Music We Trust stage at the BBC Radio 1 Big Weekend in Preston. They also performed at the UK leg of Live Earth on 7 July 2007 at Wembley Stadium. Furthermore, the band played sets at T in the Park and Oxegen 07 that same weekend, as well as Glastonbury and the Reading and Leeds Festivals later in 2007. Bloc Party announced a tour of Australia and New Zealand in August 2007, which would include a special appearance at the Splendour in the Grass Festival on 5 August. On 17 September 2007, they recorded a set for the PBS show Austin City Limits a day after playing at the Austin City Limits Music Festival. On 27 October, the band performed a set at London's The Roundhouse with the Exmoor Singers, a London-based choir, as part of the BBC Electric Proms. The set included songs from both Silent Alarm and A Weekend in the City along with the first British live performance of "Flux".
QUESTION: Where else have they performed?
IN: REO Speedwagon (originally styled as R.E.O. Speedwagon) is an American rock band from Champaign, Illinois. Formed in 1967, the band cultivated a following during the 1970s and achieved significant commercial success throughout the 1980s. Hi Infidelity (1980) contained four US Top 40 hits and is the group's best-selling album, with over ten million copies sold. Over the course of its career, the band has sold more than 40 million records and has charted thirteen Top 40 hits, including the number ones "

By the late 1980s, the band's popularity was starting to decline. Alan Gratzer left in September 1988 after he decided to retire from music to open a restaurant. In early 1989, Gary Richrath quit after tensions between him and Kevin Cronin boiled over. Cronin had been playing in The Strolling Dudes, a jazz ensemble that included jazz trumpet player Rick Braun (who had co-written the abovementioned "Here With Me" with Cronin), Miles Joseph on lead guitar and Graham Lear on drums. Lear had already been invited to join REO in September 1988 as Gratzer's successor and Joseph was brought in as a temporary stand-in for Richrath. Back up singers Carla Day and Melanie Jackson were also added. This lineup did only one show, on January 7, 1989 in Vina del Mar, Chile, where it won the award for best group at the city's annual International Song Festival. After that, Miles Joseph and the back up singers were dropped in favor of former Ted Nugent guitarist Dave Amato (who was brought aboard in May 1989) and keyboardist/songwriter/producer Jesse Harms.  The 1990 release The Earth, a Small Man, His Dog and a Chicken, with Bryan Hitt (formerly of Wang Chung) on drums, was a commercial disappointment. The album produced only one, and - to date - the band's last Billboard Hot 100 single, "Love Is a Rock," which peaked at #65. Harms, disenchanted by the album's failure, left the group in early 1991.  Shortly after his departure, Richrath assembled former members of the Midwestern band Vancouver to form a namesake band, Richrath. After touring for several years, the Richrath band released Only the Strong Survive in 1992 on the GNP Crescendo label. Richrath (the band) continued to perform for several years before disbanding in the late 1990s. In September 1998, Gary Richrath briefly joined REO onstage at the County Fair in Los Angeles to play on band's encore song, "157 Riverside Avenue". He then joined REO once again in Los Angeles in May 2000 for the same encore but no serious plans for a reunion ever materialized.  Having lost their recording contract with Epic, REO Speedwagon ended up releasing Building the Bridge (1996) on the Priority/Rhythm Safari label. When that label went bankrupt, the album was released on Castle Records, which also experienced financial troubles. REO Speedwagon ultimately self-financed this effort, which failed to chart. The title track did make R&R's AC Top 30 chart.
QUESTION:
What were the changes in the 90s?