Didn't get aquainted with any, but I would bet there were a couple of over 50's in the band on my recent cruise. I would think the experience and maturity would add to your value as a member of the staff/crew.
I"m not aware of any age limit. The lead trumpet on my last ship would have been all of 50 years old. A good player is all you need to be. Not even a great player. They seem to want me back and i'm not that good.