Brian Holtzman (Comedy Mothership, SHOWTIME) Headlines The Riot Comedy Club is a night of sharp stand-up at The Riot Riverwalk in San Antonio. Holtzman comes in fresh from his residency at The Comedy Mothership in Austin and has built a cult following with his Walkout Videos on Instagram. He's known for perplexed takes on everyday life mixed with his own neurotic behavior, and his Showtime documentary appearance adds some serious comedy cred.