Tips for hosting an entertaining/energetic movie-watching party?

Hey y'all. My wife and I are throwing a summer movie party at our house in a couple weeks. We're playing RRR on a projector and hiring a chef friend of ours to cater dinner from his Indian food cart during intermission. We want to curate a rowdy, hotting and hollering atmosphere, but we're nervous about keeping things engaging during the entire runtime. Plus we have the typical "what if people don't vibe with the movie" concerns. Any tips for throwing a great party around watching a movie, especially a long movie?