I had created similar app to find out where people are hanging out or checked-in: http://misotrendy.com http://misotrendy.com , it allows you to get a snap shot

I had created similar app to find out where people are hanging out or checked-in: http://misotrendy.com http://misotrendy.com , it allows you to get a snap shot of checked-in people at a place anywhere - its a Web app and html5 mobile web app - @krisrak