Wendy~ I've been to Cleveland many times. Mostly visiting relatives that are scattered throughout the suburbs of Cleveland. You might be pleasantly surprised with the scene...
I'm not sure if the Indians are going to be in town or if you like baseball. If they are, Jacobs Field is a great place to watch a game.
The Flats on the Cuyahoga river is a huge party place, lots of bars and restaurants. I'm sure you can find some good tequila there.
It's been quite a few years, but I remember being very impressed with the The Cleveland Museum of Art.
http://www.clemusart.com/