It's an open session so many of them are probably also hobbyists without gigs. There are weekend sessions in Dallas (I think one is open and the other is invite only), and one on Tuesday in Arlington. Not sure of how many others might be in the area since they're all pretty much a bit of a distance from where I live, sadly. It might just be that this place only had a spot open for it on that day... I haven't spoken to any of my friends to see what they've heard about it (or if they're going... they tend to do the Trinity Hall/Dallas and J Gilligan's/Arlington sessions). I'm curious to hear how it is and how it goes over time.