Sounds more like your dream of living in New York, the reality is (although they had a ridiculously lavish apartment) they are just like everyone else, working, living in one area and trying to get through life. Get married, have kids etc. Wouldn't be able to afford painting the town red all the time.
You expect people to be living it up but it's really just home to them.
Although it reminds me of the episode where they take their surrogate sight-seeing and Chandler acts like he's never seen all the landmarks in New York.
And I've been to NY, it's not as... "glamorous" as it looks.
People are probably aware of this but it was filmed in LA, so that's probably the reason for the lack of New York locations.