There are two New York Cities, the real one and the moviefied one, and you might need to love both at least a little to fall for Todd Strauss-Schulson’s goofy-delightful Isn’t It Romantic. The movie opens and closes in a version of the real New York, a stinky, noisy collage of 99-cent stores and food carts adorned with jaunty photos telling you what a falafel looks like, of people walking every which-way, locked away in their own private earbud worlds.