You are! What you meant to ask is if there "are any specials running tonight?"
What's good here?
At the heart of this question there's an honest desire to learn what makes a bar unique, but there are far better/less condescending ways to ask. This implies that other than their specialty rum punch bowls, everything else tastes like a snifter of mediocrity.
Could I have something that's not too sweet?
Your bartender is probably happy to lay off the simply syrup, but this question rules out Jolly Rancher shots and little else. The problem is that everyone's sweetness barometer is different, and also that the stereotypical person asking this question doesn't know any other criteria for how to describe a cocktail. A bartender is glad to listen to you as you describe your tastes, so do that instead.