Never a "hairy" one like you describe, a bit stubbly maybe.
On a related note, not too long ago I was at a club and a waitress bent over to tend to a table next to me & I saw all sorts of hair poking out of her bottoms. She was somewhat overweight & the sight caught me off guard. The guys at the table she was tending to saw me see it & saw the horrified look on my face & burst out laughing. They didn't realize I saw hairy asshole, they thought I just saw the fat assed waitress bent over and made a face. After she walked away one of them said something to me. I just kinda shrugged it off, not wanting to badmouth the waitress and wind up with asshole hair in my drinks all day. I insisted it was just jolting to have so much ass so close to my face unexpectedly.
A few minutes later my drink is low, so I waive her over. She had trouble hearing my order. So, she bent over again but this time her ass was directed at the other table. I saw one dude see what I saw, but instead of making the disgusted face like I did he motioned to his buddy to look. His buddy's head was less than 6 inches away from her ass, so when he turned around he not only saw what I saw but caught a whiff as well.
As she walked away I noticed the one guy laughing and then saw his buddy's horrified face and burst into laughter myself. Also, the reason the waitress had to bend over to get my order was because I was also ordering for the stripper who had been sitting with me throughout the first sighting and was currently on stage. She apparently saw the whole thing coming as soon as she saw me waiving over the waitress and was on stage crying trying not to laugh. To top things off, she brought the drinks from the other direction and bent over facing away the table on the other side of me, and of course the guys at the far table were choking and laughing again so that guy turned to look and got an eyeful of hairy asshole and then realized what all the laughing was about.
The thing is, I don't think any of us were trying to be rude or really even laughing at the asshole. It was everyone else's natural reactions that were so funny. I discussed the possibility of saying something with the dancer, but we agreed there was no nice way to do it.