My boyfriend hasn't come home?

My boyfriend went to "have a quick pint" over 5 hours ago and hasn't come back. His phone is turned off so I can't check if he's alright and I'm really worried. He's a terrible binge drinker and I think he's decided to pull an all-nighter again. Trouble is he has work in the morning and he gets so bad sometimes that he doen't get home until the early hours. One time I woke up to find him sleeping on the door step. He's also woken up in alley ways before. I want to find out where he is to see if he's ok, but I'm not sure what do about it. If I go hunting in every pub where I live (and there is a lot) then I might miss him when he decides to come back. Should I call up every pub, or do you think they'd refuse to help me? I'm so worried! :(