Of course, this article does suggest a basic challenge--is the early date supposed to be part of the vetting process? If so, then do take a person to a movie that might alienate someone who is not the perfect soulmate. If the aim is a bit more, ahem, short-term, then different criteria come to the fore.
Any readers have any suggestions? Obviously, this blog would recommend Harry Potter, Indiana Jones, Star Wars, or a Zombie movie, given past posts....
For romance, the HP to see is Half-Blood Prince, with the Ron-Lavender-Hermione triangle and the Harry-Ginny courtship, although Order of the Phoenix has the Harry-Cho romance. Both books end in death, but, in Phoenix, romance dies due to perceived betrayal. So, HBP > OP.
For Indiana Jones, Raiders uber alles. Karen Allen and Harrison Ford have the best chemistry, and no bouncing nuked frig in this one.
Star Wars: Empire. There is some relevant romance in Return, but Empire has the best response to "I love you" that I can remember. And, of course, "Who you calling scruffy-looking?" Of course, you have to ignore the brother-sister kiss, but that is early enough not to spoil things.
Zombies: Shaun of the Dead and Zombieland both have a nice combo of comedy and romance. And the scary stuff just might work to get a couple closer together.
Of course, there are other options. Say Anything is a classic, but only if neither viewer has either been stalked or been picked up for stalking.
Any suggestions from spew-fandom?
Oh, and some more advice for dining out on V-Day.