Woah, I figured I must have reviewed Phipps. But I haven't!
I'm not a flower guy. I mean, they're ok and all, but I never figured I'd enjoy going to a flower garden. But I love Phipps. Everything is really well done, and they don't care if you just stroll for a while. The butterfly exhibit is really awesome - just go during the day, because during the evening they're all sleeping.
Carnegie Mellon students get in for free, so for four years, I had the perfect date spot. It's free! It's next to campus! You seem more sensitive than if you suggested you watch Grindhouse.