Ha...
I'm in the midst of a reunion right now. I was the singer in a metal band in the 80's. We did the Friday Rock show on Radio 1 in '86, and dear old Tommy Vance was very kind with his compliments.
It came to an end in the late 80's for various reasons, and we went our separate ways.
20 years later, we all got together for a drink and to reminisce about old times. It was great to see the boys again, and of course it ended up with a jam arranged.
The bass player hadn't touched a bass since our last gig 20 years before, so it was rusty, but the bones were still there, and I could still hit the notes too which was a bonus.
It's been great fun, and we plan to do a one off gig later in the year, just to let our kids come and take the piss out of their old dads wearing spandex again.
As long as it's seen just as a fun thing, without any pressure, I'd highly recommend it.