If you look young, you can get away with it........ otherwise, you should wear more cardigans and don a moustache and maybe get into cigar and whisky evenings.
Otherwise, you'll show you're committed and don't give a fuck about your age, show up at the concert and be having lots of fun until you overhear some young kids say: "look at that old man, what's he doing here?"
"Oi! Old man, shouldn't you be at home washing yer underwears?"
