I love the nightlife, I've got to boogie. The usual context is indeed a social one, and is usually referred to as something that is 'getting to you,' or 'too much for you' - after one has been 'in' it for some time. Involves drinking, dancing, usually drugs, and let's throw sex in there as well. Money is spent. It's a good time, but eventually you have to bail out or it steamrolls you. Or so I hear.