Speaking of doubleheaders, I knocked out nine dates in a night by using a service called CitySwoon, that arranges a more modern, fun take on meeting people IRL.
The thing about speed dating is that it's a great way to practice small talk if dating makes you nervous. That wasn't my issue, but I found it to be a helpful exercise in determining what I was actually looking for. For example the cutest guy at speed dating asked me out for a second date and I was downright giddy. But then on date number two I realised he wasn't a match for me at all, he was just, you know, the cutest guy at speed dating.