What about socially determined "meet a date" nights?

For an area, you have each user pick a place.

All the places go up for vote.

On whatever night, it's date night at that place and it's like a flashmob meets speed dating.

I would think you'd only need a handful of people in any given geographical area for this to work (though I could be wrong).

I disagree. People go to the bar when they're ready to socialize and meet people, and they'll value something that makes that easier. Making it more geo-aware makes people have to decide which parts of their day they want to be interruptible, and I think makes the app more intimidating.

I like the bar tie-in, it provides a pleasant addition to something people are already doing.

Well, like every other time you'd like to opt out of social contact, I'd just assume there was an "off" button.