Does age matter? Depends on the target audience. If it's a bunch of assorted herberts down the pub or a bunch of heavy metal orcs then probably not, but for anything else? Maybe.
I first ran into age discrimination when I was 20. I phoned about a gig advertised in MM and was told I was too old, because the band leader was 13!! I know a great guitarist who was told he was too fat and a brilliant bass player who was told he was too ugly. Presentation does matter in many instances. If you're old enough to be their Dad, then you probably won't be fitting in on many levels.