How to unlock the Swarm Badge – Foursquare

I have to admit this badge took some time to unlock. It actually is a fairly simple badge to unlock. In principal it could be one of your first badges to unclock and can be unlocked along with the Newbie badge

To unlock this badge, you simply have to be checked in at a location with 50 other people. When

Swarm Badge

you do you get the message “50+ people are also checked-in here – it’s a foursquare flashmob!”

For me it happened last week when I was in Chicago for Internet Retailer. IR, is a yearly conference for those who are involved in online shopping.

When I got the badge, it got me thinking why on earth did it take so long to actually unlock it, I mean I should have been able to unlock it earlier, but it turns out, I have not been in a swarm.

So what are some swarm suggestion?

Here is some I can think of

Hockey, Football, baseball game

Movies

Theater or some performing arts event

A shopping mall

What other ideas do you have for a swarm? where did you unlock yours?