Why are the (few) posters who still go clubbing and partying over the age of 35, pouring scorn and derision on people over 35 who like to stay in of an evening most of the time, or just go to see a show and have a quiet meal?
At least 3 or 4 posters have called most people on this thread, boring and miserable and dull, and said they don't understand the posts on here, and the thread is 'depressing.'
Commenting that people are boring, because they don't want to act like a 19 year old, when they're knocking the door of middle age, is just rude and judgemental. No-one on here has said anything about people who DO go clubbing in their middle age! (Well not so far!)
Most people (including me) tend to do all their partying and clubbing before their mid 30s, and people still doing it in their late 30s, their 40s and their 50s (and older) are the exception rather than the rule.
The only ones I know who are clubbing and partying when they're close to their middle age, are people who settled down really young and started having babies whilst still in the teens; so they're living the youth they never had.
I could say that women 35-40+ clubbing til 3am several times a month, in a place that usually has teenagers and uni students, is a bit sad and tragic, but that would be catty and snide. Just like calling people boring and sad for not wanting to go partying and nightclubbing past the age of 35! 
Moreover, most people don't want to be arsed (by 30-35,) because we have already DONE it all (for at least 10-15 years,) and have had enough of it.
I can only surmise that the few posters who still do it, didn't do it when they were young, and they're trying to re-live the fun and wild youth they never had. 
Crack on by all means, but stop slagging off and deriding people who have been there done that, and don't wish to do it anymore!
Just because someone doesn't do the same as you, that does not make them 'boring.' People like this (the few judgy ones on here) are the kind of nightmare people who I avoid like the plague. Moaning and nagging for you to go out partying and clubbing, and calling you 'boring' when you say no!