Although not really a ONS more very casual FWB situation.
Ended up leaving a really good night out with my mates to hook up with him (that fine, haven't had sex in a while)
He was drunker than I thought initially so sex was shit and lasted about 10 minutes. He then starts making noises about having stuff to do in the morning. I wouldn't have stayed over anyway but it still made me 
. Called a cab which was on its way when he says oh no stay I've sobered up a bit now. Hoping for some of his usual decent sex I cancelled the cab and re booked for an hr later. Fixed minuets later he's done and says oh shit you've got a whole hr to wait until your cab. Then starts making noises about needing to sleep and can I call the cabbage earlier.
In the end I just said I'll wait outside and left. He made a mumble about oh no don't do that etc. But was right behind me locking the door.
So I've just spent 30 minutes standing on a street corner waiting for my cab with drunk assholes walking back cat calling me 
Deleted and blocked!