I wouldn't be personally keen on Glastonbury because of its size and the fact that I live in Australia, but at 64 I still go to music festivals not aimed at my age group. There are plenty in the 50s where I go, unsurprising when the headline acts are OAPs, but the only tragic element is no-one in my immediate friendship group will go with me and now DH is dead it's a different experience.
YABU.