If you want a social guild that will actually last, you need to be constantly thinking of new ideas to keep everyone entertained. If you aren't filled with creativity on your own, it'd probably be best to join someone else's social guild instead. As the leader, you'll be responsible for making the guild seem fun, and if you find it difficult to think of activities for your guild to do, people won't be invested enough to stay long term. I've never been in a social guild, so my opinion on this doesn't hold much weight, but that all sounds right to me.