I really like Opus. I feel like it's one of the few bars downtown that has a happening scene without being a rowdy college scene on a Saturday night. It's classy and intimate, and the drinks are delicious. They're more pricey than I'd like, but the prices are reasonable for martinis. Their martini concoctions are extensive. I really enjoy their champagne martinis and the tokyo rose with sake and plum wine.
The food is okay. It's not fine dining, but more upscale than your average bar food. But really, I'm there for the martinis not the food.