I've attended as a customer and played an open mic. Your description of the PA setup is accurate and the sound wasn't great. There was no house amp and the bass signal was fed back through a very weak floor monitor (very little bass in the overall mix!) It honestly looked like there was a couple of kids behind the desk and it delivered a very echoey sound but maybe that's because its sort of outdoors. Does seem to be a well attended venue though, for what it's worth.