I'd actually like to see your argument - I can see the possible benefit to business owners if their customers use Foursquare, but I've never been able to figure

I'd actually like to see your argument - I can see the possible benefit to business owners if their customers use Foursquare, but I've never been able to figure out why anyone would want to use Foursquare in the first place. What benefit does the user get out of checking in everywhere he goes?