From Zappa Wiki Jawaka
Rex Jakabosky sat-in often with The Blackouts in 1957 "when their piano player couldn't make the gig", became a full member in 1961-62, and provided guitar, harmonica, & vocals. He also recorded with Zappa at Studio Z in Cucamonga.
Once I was at school just swifting my fingers on a piano when some boy appeared beside me. He listened for a while and than said that he liked the way I played. That`s how I met with my older schoolmate Frank Zappa. We were good friends. I used to visit Frank in his apartment, we would drink coffee, smoke cigarettes and listen to the blues. He was always a personality. We played together in the school band and later for about another three years in different bands. His musical journey was than different from mine, even though he could never deny his blues roots / irony, sense of humor, skepticism etc. I stayed with the classical blues untill today. I saw Frank for the last time in 1989 when we met over a cup of coffee and spoke about the old times.