During a sit-down with Mashable reporter Adam Ostrow at 140conf in New York City this summer, Dennis Crowley, the site’s co-founder, discussed the explosion of merchants and brands that are adapting to (and banking on) the concept of checking in.

Sparksheet editor Dan Levy caught up with Dennis Crowley backstage at the conference to discuss just how Foursquare is bridging the online and offline worlds and how brands are using the location-based service to drive engagement.

“What we’re trying to do is get a lot of brands to think of Foursquare as a lens by which other users can see the world through their eyes.”

For more, check out From Check-in to Checkout: Video Q&A with Foursquare’s Dennis Crowley