Taben, I'm sorry you're confused about South Beach. I can't stress highly enough that while you can't (in my opinion) do
any plan effectively without reading the book first, you absolutely
HAVE to read the South Beach book to do this plan effectively. Much of South Beach (especially the transition to a workable Phase 2) relies on your using the knowledge you gain (from reading the book) about how your body works to help you pick foods that work for your body.
There's nothing "low carb" about South Beach. You can eat 1,000,000g of carbs a day on SBD as long as they're GOOD carbs (from the "Foods to Enjoy" list) and you don't have cravings from them. You have to stop thinking about carbs if you want to do South Beach.
As for the movies, roasted chick peas is a good idea, as are string cheese and nuts. However, I found that it was also helpful to learn to watch a movie without any food involved. DH and I had dinner at Ruby Tuesday's (which is a great Phase 1-friendly restaurant) and then went to the movies. I was so full from my dinner that I didn't feel the need to eat. That said, the smell of the popcorn can be very enticing, so I find that sometimes it's just easier to watch movies at home.
You can bring some sugar-free gum with you for something to chew if you find that you need it.