I love Half Fast Riders.
You've described your current demographic, but do you want it to be limited to that? Might be riders out there in their 20s-30s who'd love to join in but are turned off by a club name that screams We're Old!!! I'd focus instead on the casual "personality" of the group. I wish I could offer suggestions but have about 3 spreadsheets in front of me so not feeling very creative