It's a common theme, laura
Think of it like a packed, noisy bar, where you're there on your own. You'll strike up a bunch of conversations with a bunch of different people. Often they're talking to other people at the same time. Most of the conversations will end up tailing off as you're just not interesting each other. Some may end up with you exchanging numbers to meet again. Some of them will end up with them flashing you their knobs because no one else can see and they won't get in trouble.
Then there's the added difficulty that you only have a photo, so you don't know if there's chemistry, or if the photo is even recent or real. And some of them are married.
Also, some of the bars charge for entry, and some have thousands of people who went there once, years ago, left a profile and haven't been back since.
But on the plus side, you can have the telly on and a nice glass of wine while you're chatting with them