![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRBIdXu2eWXKpzZJnmKNAzmOmZHv0P_-xO_lydkbG1g7BPJO5Sq-Z0nCQ_SD94xME7Kp5YqwMH0YgkWpHxgkuTZWTE_k8lmHv_-TQNuCkyARzEiqihKGAzT61er-hZInCAWZtM/s320/megaphone_games.jpg)
Sci-Fi Tech writes about Megaphone, a company that turns mobile phones into controllers for games that run in public spaces on large screens. Call in a number to join the game, then control your piece of action by punching buttons on the dialpad or by simply barking out orders.
I've played a game of Battle Tanks this way at a demo by LocaModa, another company that develops interesting mobile apps. Lots of fun. Would probably work well for movie theaters, too.