At least three bands are known under the name XYZ. 1. XYZ was a hook-laden heavy metal band. They were considered the unofficial house band of the Los Angeles nightclub The Whiskey in the mid 80's, but major success eluded them. XYZ began in Los Angeles, California, with members Terry Ilous (vocals), Bobby Pieper (guitar), Patt Fontaine (bass) and Joey Pafumi (drums). An early development deal with Atlantic records led to the recording of their debut album, which quickly got radio play with the hits "Inside Out" and "What Keeps Me Loving You. Read more about XYZ on Last.fm.