1. The term “gentlemen’s club” used for a strip club. I don’t have a problem with calling them “men’s clubs”—actually, I’ve never seen that term used; why not?—but I wouldn’t call the men who frequent that type of place “gentlemen.”
2. People who say “myself” instead of “I” or “me” because they think it’s fancier. Example: “Roger and myself would like to go to the gentlemen’s club, but we can’t, because our wives might find out.” In this case, you should say, “Roger and I.” You wouldn’t say, “Myself would like to go.” Okay, then.
If you have anything that bugs you (it doesn’t even have to be grammar-related), post it in the comments and I will read it and probably say, “That bugs myself, too!”