I prefer 3 - 4 people, but larger groups are also nice. As long as everyone is contributing in the weed or paying for it, it's nice. I hate it when they don't contribute and just wait for the going joint. But we try to skip them as much as possible, or they're the last in line. The advantage of larger groups is that there are more joints passing around the circle, so there are more different kinds of weed. That makes you really high. But I do prefer smaller groups of 2, 3, 4 people, then you can have a better chat with each other, also the joints pass around quicker, also the different weeds are great for the buzz.