Barr Sinister (ca 1968-69) included Mike Boeck (bass guitar), Bob Mann (drums),  Rick ? (organ — NOT "keyboards"!), Bill ? (?, help me out here somebody), and myself (electric guitar).  There was apparently one photo session at Mike's house.  I remember one gig, but I think we had a few others.  Thanks to Rick ?, we killed on In-A-Gadda-Da-Vida.  We had a business card.