At $25NL, if there are three or more people in the game, you don't have an ace, and the ace comes on the flop, you really might as well quit. One or more of them are bound to have called with ace-and-anything.

(or you can rep the ace yourself if the size of pre-flop raise/reads on the players concerned implies this would be a good idea - I just wouldn't do it as a rule)