Curious what people here actually think: Is facebook hookup a real feature or just people using Groups?
For what it is worth, a first meeting in a busy place removes most of the problem — your mileage may well differ.
In my experience, recommendation lists tend to reflect affiliate deals more than quality — that is roughly where I landed after a lot of trial and error.
Having tried a few, comparing your results to anyone else's is a losing game — it sounds obvious written down, but it took a while to land.