I have never told anyone I work with that I go to clubs due to similar reasons. When I have been asked about my holidays in Ibiza I always say they have been mainly quiet, spent on the beaches and a few meals and cocktails.
Now I'm a bit older I actually think I have the issues, not the people that ask me. Clubbing and the things that go with it is something I have always kept to myself and friends outside work. A secret life if you like.
Wish I was able to do the same

Everyone at my work now knows that our group is really into clubbing, and lots ignore us now classing us as 'druggies'!
Thats good coming from them when their all falling all over the place at a local club being sick and fighting with each other on booze, while we go to a place, have a very good laugh, all get on great, and dance all night.
Twats