Café Eleven is a favorite place of mine to eat a quiet lunch but the one show I've seen there, Tapes n' Tapes, was extremely drum heavy, leaving me with the impression that they don't quite have a handle on sound quality. I knew how their songs were supposed to sound, and the sound quality didn't quite match their rather accurate playing (that I could see from the front row). It was pretty cheap, however, and was set up as a great venue, especially considering that it was converted from a gas station.
The turkey sandwich made with apple slices and cranberry jelly is amazing! The sandwiches are huge enough to split and they are probably the sole vendors in St. Augustine of bubble teas, if that's your fancy.