Tis a significant cause of contention in my relationship that I am stay at home watch DVD's together in bed kind of guy and my girlfriend likes going out to the pub (I dont like drinking, except a glass of wine over dinner, and I find this mind-numbingly dull)... Compromise has been that we went out for dinner a lot (which I do enjoy, but is expensive for students) and go to the cinema sometimes. It is still a real problem though, when I go out sometimes it feels like I am making a considerable effort which my girlfriend doesn't recognise as she has higher expectations and is constantly unsatisfied. I always say that if she wants to go out for drinks more, she can go out with friends, which I think would produce a perfect balance between 'us time' and girls nights out. Even though it seems a comparibly trivial issue it seems to cause more trouble than many more seemingly important problems we have, and has often triggered near-breakups. I think lifestyle compatibility and enjoying doing the same things together is more important than people can possibly imagine especially in the long term.
OP - In this case though it seems likely that the guy might calm down eventually, as it would just be sad if he wanted to go out clubbing all the time into his 30's... Differences can be overcome so long as you are both pleased and content with the situation, but if one person finds it annoying it will only get worse.