If I get stuck behind a bunch of slow players I usually just wait patiently around the tee and get out a wedge or something and chip around for a bit to pass the time. You know, try to hit to the nearest tree if one is near the tee or something like that. But usually I play with friends so we have something to talk about, like the latest baseball game of our favorite teams or something cool that happened on that particular hole before or something like that. In your situation, with the slow people you were playing with, I probably would have left. I can't take people who seem deliberately slow like that.