It could be a problem, it might not. I know a lot of people who go out and drink and drink and drink, I think it's a problem but it's not that big of a problem, because you're only looking for a good time right? It's when you start drinking on your own, that's when you need to worry. I'd keep a check on it, make sure it's not too frequent and if you feel like your losing control don't go down the pub. Buy a dvd and sit in and watch that.
I'm a recovering alcoholic and when I go out to the pub I just drink coke. You can still have a good time with your mates and not drink. They might think you're a bit wierd for it but that's their problem.
But when you start drinking Baileys in your coffee in the morning to get the buzz going you know you're in trouble LOL