I had a really good booking experience with Afton! I am singer/songwriter in Portland. It seems weird at first, because they often contact people out of the blue, but I sold a few presale tickets, and played with some bands that ended up being really good. I didn't even sell the promised 15, more like 9. I guess if you sell no tickets though they might kick you off the bill.. The system takes a minute to figure out. My personal experience though, the sound man was great, there was a good audience, and I met great musicians. So maybe worth it for that, way easier than booking your own gigs.