Stargazing on the High Line

Date: Every Tuesday
Time: Dusk
Location: Somewhere on the High Line (depends on night sky conditions)
Perfect For: Sealing the deal with your new shorty
Website: thehighline.org

It's tough coming up with new and exciting date ideas, especially if you're trying to do it without spending a dime. Not only is stargazing on the High Line free, you get to use high-powered equipment and get expert-level advice from scientists. Then, once you're done checking out space's heavenly bodies, you can attend to other ones.