Well, Adam has an app for your smartphone, and it works quite well. A few months ago I was in The Green Lantern, boooored, and ended hoking up with a guy staying in an hotel nearby, thanks to A4A app.
Grindr and Adam, both are a mix of hook up app and social network. You know, those guys actually looking for friendship and/or love. I think Adam comparatively clicks more on the hooking up side.