A bit late to add to this but what a misconception! I am 64, my husband is 51. We go to Portugal x 2/3 times a year, to a village we have visited for 25 years and have many friends. We stay in apartments, eat out, go out all day, and party every night until 3 or 4 in the morning with our very old friend, Pam. She’s a glamour puss, can drink us under the table, and she’s 85! We host two big parties at home every year, Christmas and my summer birthday, the last attended by friends spanning from 22-87 years of age. It’s our younger friends who leave earliest, although they may just well be bored by a bunch of old piss heads having such fun.
So stop stereotyping! You’re getting older as I write and hopefully once you are over 50, will reflect ruefully on how wrong you were