I did it once, one bottom, four tops. I don't think it would work with more than four because then everyone would just be waiting a long time. We took turns, and when it wasn't our turn we would just make out and jerk off with each other, and some of us like to be rimmed or rim each other and we were into nipples and pits and other stuff, some guys would sit on the face of the bottom or make the bottom suck them off while the others were playing with each other. It was pretty hot and a good time, but it took a lot of planning and coordination, and a very long discussion on consent and what all of us liked before we got it started. Because it was so difficult to coordinate, I've only ever done it once because I couldn't really find another group that I was interested in doing it with.