I forgot to mention I went to TSP after SexMob and caught some of the jazz jam, which included Daniel Carter and the 2 trumpets, sax, and 1 drummer from the last time I saw them. I think they do that often.
It's great music, they are in a great, comfortable spot in the Park, very close to the entrances on the Northwest side. I have a rule about going into any parks after dark, no matter how many people are there or how many people I'm with. There was no sense in applying it in this spot, though.
I hope the weather stays good and they keep doing this for a while. Being outside, all those horns never seem too loud.