The music scene is shallow and very age-aware. If you're trying to join an original pop/rock band your age can work against you. Do you actually look old? When auditioning I say I'm at least twenty years younger than I am. Though I suspect this is still seen as too old by some.
I well remember when I first started playing the bass as a feckless teen and knew nothing about anything, I assumed that anyone over 25 was old and worthless. It's all relative. I'm currently having fun in a country band (which I almost joined by accident) and in that genre no-one gives a toss about how old you are, how grey your hair or how inflated your spare tyre (though I've yet to go grey, which is a bonus).
I'm doing more gigs than I have ever done in my whole life, apart from a memorable year or two in the late 70s. I'd say don't worry about it, if it's a problem for anyone then it's a good sign you don't want to be having anything to do with them.
I think the general perception is that, for whatever weird reason, older bass players can only play roots and fifths and will want to be playing either old rock classics or soul/Stax/Motown covers. You can't possibly be an original, talented and tasteful bass player if you're in your fifties, can you?