Ginko is quickly becoming one of my favorite happy-hour spots in the 'mont. The restaurant serves the best sushi I've had in Cleveland, and has a very cool, fun vibe. If you want to try the sushi, but save some money, definitely go for happy hour - 4:30-6:30 M-F. Tuna and salmon rolls are $5, beer and cocktails are half off, and a carafe of sake is just $4.
My only complaint, as other reviewers have noted, is that most of the seating is along a curved bar. While this is fine if you're just 2 or 3, sitting against the bar is not ideal for more than a few people - something to keep in mind if you go with a larger group.