Their Mojitos give you awesome dreams. I'm not kidding. Last night, after a couple (literally, I only had two, this isn't code for I got wasted... although it usually is), I dreamt that I was in some sort of vampire army where all the guys where hot and shirtless. Let's just say it was a good dream. I can't guarantee you too will find yourselves in the rippling biceps of the undead if you drink their Mojitos, but it's worth a shot.
Aside from the pleasant side effects experienced later, Havana Cafe is a must try. If not just for the fact that it's charming. I'm not a Mojito connoisseur, so my opinion means nothing. I will say, the second one was a bit too sour for my taste. I need to go back and try the food to really make a judgment call, but the service was great and the one appetizer I tried was pretty tasty. I'd probably go for the bean dip and banana chips next time, though.