I rarely go to bars because I don't drink, but in some instances I do go to eat or listen to a band. I was pretty regularly carded just to be allowed in such establishments until I was in my late 30's, because I looked young for my age and they preferred to err on the side of caution.
Sadly, nobody cards me anymore. I guess even when you look young for your age, it's all relative. Most people think I'm in my early 50's. I'll take it, since that's still 10 years younger than I actually am!