So maybe you do remember where you first met your girlfriend, that’s a good sign. But there are a lot of people who you’ve met and you probably don’t know where you met first.

A lot of people use foursquare to check-in at locations, especially at parties and events. You become friends, and one day you ask each other “Where did we meet again?”.

The web app Intersquares lets you intersect your check-in’s with theirs.

When you log into the app, it pulls in all of your foursquare check-ins. To find out where others checked-in with you, you have to send out a link. It sounds annoying, but it’s an opt-in process that makes the experience fun.

If people want to play along, they can click the link and let their foursquare check-ins be cross referenced with yours.

Intersquares 1 1 520x176 Forget where you met your girlfriend? Intersquares might be able to help

It’s actually pretty handy if you attend a lot of tech, sporting, or music events and have become friends with people you met there.

Have we met somewhere before and checked in together? Click here to find out.