What typically happens at a speed dating event?

I’ve always been really curious about speed dating and there’s one for lesbians coming up. The thought makes me kind of nervous, though, and before I decide to go, I’m wondering what to expect.

If you’ve ever done it, I’d love to pick your brain. Any details at all would be helpful, though. What is the vibe like? Was it weird? Was it fun? Did you meet anyone?