Many people, when stumped for something to talk about, ask, "Have you seen any good movies lately?" And movies can be a great topic of conversation.
Here's a tip: instead of asking a general, yes/no question like, "Have you seen any good movies lately?" ask about a specific movie: "Have you scene that new XYZ movie?" Make it something you have an opinion about. You can talk about why your date has or has not seen the movie. Why you did or didn't see it. Your opinions (each of yours, be sure to ask questions and listen for the answers) and movie reviews. A simple, specific question can lead to 30 minutes worth of conversation.