I go to gigs most weeks. Every year there tends to be a week where I have several. This week, it was five (nearly six, as I originally planned to see Nadia Reid at The Bodega on Monday). That’ll seem like overkill to some, but last year I was at the South by Southwest festival in Austin, where I would sometimes see five acts in a day, and I’m a regular at Green Man festival, where I’m likely to see even more. The week was bookended by shows from two bands whose front-men are 58, a few years younger than me: Mercury Rev’s Jonathan Donohue at the Rescue Rooms and saxophonist/band leader Tony Kofi at Peggy’s Skylight. I’ve seen both many times before. Each band…