As this is a music forum, I'd just like to say that I spent last evening being entertained by a choir, an orchestra and a school swing band. Their ages ranged from around 14 to at least 75 (I knew some of them). They were all paragons of politeness and charm, all displayed astonishing talent, irrespective of their ages, and they all interacted as equals.

Friendship in music clearly doesn't recognise age difference as any kind of barrier. It was a privilege to be in their company, and a joy to witness 150 or so people of all ages joining together to produce something truly beautiful.