I had wanted to join a meetup group for a long time but never really found one that suited me. My interests were not leading to groups that were very active, had that many members or met too far away from me. However, earlier this year I discoverd the perfect group for me. The Central Bucks 20/30s is different than other groups, it is very democratic - any member can suggest or host an event and that allows for more variety and two events or more per week. Bowling, plays, pool, mini-golf, dueling piano bar, ice and roller skating, picnics, hiking, outings at resturants all over the area; there is bound to be an event that members would be interested in doing. I also joined the Southeastern PA Nerd Herd and went to two events as part of that group.
Check out the links below if you are interested in these groups or groups that meet in your part of the world.