Make it down there on Monday and bring your axe if you're a player. Bring your ears of you don't play. You won't be disappointed. And let's not forget the King of Jams, Mike Ellis and the Funtones featuring Jackie Huddle. Mike and Jackie have been running jams in San Antonio for more years than they probably care to admit.
Blues tends to dominate over half of the evening.
The Funtones have the stigma of being the largest band in the known cosmos. The way to become a Funtone is to get invited to play the second number with the band. If you are not asked to remain on stage after the first song, don't get offended. Go home and practice. Then come back and try again.