Then you already know them and dating wouldn't be a thing you need. It isn't a part of our social interactions. We don't use the word much, and when we do it is the English one...

If you wanted to have a relationship with a friend, then you don't have to date them to do that, you would probably just end up sleeping together then call it a relationship from there.

Also: alcohol is your best bet and even if you are not drunk or anything close to it, that is involved at some point.