As a frequent user of meetup.com, I feel like it succeeded at making people one-time acquaintances and failed miserably at making lasting connections. I'm a member of several groups and most of these groups do not see any single individual more than once. I won't even mention terrible attendance for just about any groups I've ever been a part of. I think there could've been a lot of improvements made here but meetup really hasn't done anything with the concept for years, which is a shame. I still think this space is ripe for innovation.