Question: Who, if any, was a member of more than one band, Ric Ocasek or Pepper Keenan?
Context: "Magic" is a song performed by the American rock band The Cars from their fifth studio album, "Heartbeat City", released in 1984.  It was released as a single and reached No. 12 on the US "Billboard" Hot 100 and No. 1 on the "Billboard" Top Tracks chart.  The track was written by Ric Ocasek and produced by Robert "Mutt" Lange and The Cars.  Ocasek sang lead vocals. Troublizing was released by Ric Ocasek in 1997 on Sony Records.  On several tracks, it features co-production, guitars, keyboards and backing vocals by Billy Corgan of The Smashing Pumpkins.  Allmusic reviewer Stephen Thomas Erlewine called "Troublizing" Ocasek's "best solo album since "This Side of Paradise"." The Cars North American Tour Spring 2011 is a set of eleven concerts in the United States and Canada featuring the newly reunited American band The Cars.  Announced in April 2011 prior to the release of the band's album "Move Like This", the concerts feature material from "Move Like This" and from the band's 1970s and 1980s albums.  Singer/guitarist Ric Ocasek, keyboardist Greg Hawkes, guitarist Elliot Easton and drummer David Robinson perform as a quartet; original Cars singer and bassist Benjamin Orr died in 2000.  Orr's bass parts are performed by Hawkes on keyboard and bass; the vocals on songs originally sung by Orr ("Just What I Needed", "Let's Go" and "Moving in Stereo") are performed by Ocasek. Rock for Light is the second full-length album by hardcore punk pioneers Bad Brains, released in 1983.  A previous album, "Bad Brains", was released in 1982 but only on cassette, therefore making "Rock for Light" Bad Brains' first proper album.  It was produced by Ric Ocasek of The Cars.  The 1991 re-issue was remixed by Ocasek and bass player Darryl Jenifer.  The re-issued version has some extra tracks, an altered track order, significantly different mixes and, on most tracks, a speed increase of the master which results in a raising of the pitch by one-half step. This Side of Paradise is the second solo studio album released by Ric Ocasek, lead singer and songwriter of The Cars.  It was released in 1986 by Geffen Records.  Though it was a solo album, other members of The Cars played significant roles.  Greg Hawkes plays keyboards and bass throughout the album (he appears on most of Ocasek's solo albums), and also co-wrote "Hello Darkness" (most Cars albums feature one Ocasek/Hawkes tune).  Benjamin Orr is on backing vocals for three songs.  Along with Hawkes and Orr, the track "True To You" also features Elliot Easton on guitar.  Had drummer David Robinson been present, the song would have been an unofficial Cars reunion.  Both production and drumming were by Chris Hughes (formerly known as "Merrick", drummer for Adam and the Ants).  Hughes was the recent producer of Tears for Fears most popular two albums.  Steve Stevens from Billy Idol's band plays guitar on over half the songs. "You Might Think" is a single by The Cars from their fifth studio album, "Heartbeat City", which came out in 1984.  The track was written by Ric Ocasek, and produced by Mutt Lange and The Cars.  Ocasek sang lead vocals. Suicide: Alan Vega and Martin Rev is the second studio album by the American band Suicide.  The album was produced by Ric Ocasek of The Cars for Ze Records in 1980.  Recorded in January 1980, Ocasek gave keyboardist Martin Rev new equipment to perform on while Alan Vega distanced himself from the album musically to concentrate on the vocals.  Michael Zilkha of Ze, pushed to give the album a more dance music oriented sound, hoping that disco musician Giorgio Moroder would produce the album. Pepper J. Keenan (born May 8, 1967), is an American guitarist and vocalist, best known for his work with heavy metal bands Corrosion of Conformity and Down.  He joined Corrosion of Conformity in 1989, but did not become the lead singer until the recording of "Deliverance" in 1994.  In 1991 he formed Down with Phil Anselmo of Pantera, Jimmy Bower of Eyehategod, and Kirk Windstein and Todd Strange of Crowbar. Richard Theodore Otcasek (born March 23, 1949), known as Ric Ocasek ( ), is an American singer, songwriter, musician and record producer.  He is best known as the vocalist, rhythm guitarist and songwriter for the rock band the Cars.  Ocasek has been married to model Paulina Porizkova since 1989. "Emotion in Motion" is a song by Ric Ocasek, the main songwriter and lead vocalist for The Cars.  It was featured on his second solo album, "This Side of Paradise", and released as a single in late 1986.  The tune topped the Album Rock Tracks chart and reached number 15 on the "Billboard" Hot 100.  It was Ocasek's only top 40 hit as a solo artist.
Answer: Corrosion of Conformity and Down.