Systems and methods directed to detecting crowds and sharing content based on the devices in proximity to the detected crowd. Systems and methods may utilize a camera included in most mobile devices to estimate how many people are involved in an interaction with the mobile device. Depending on the number of people detected, the systems and methods may invoke appropriate actions. Appropriate actions may involve sharing information by various methods, such as sharing content on a large display, printing or emailing documents. The systems and methods may also be extended to generally detecting a crowd in proximity to a device, and invoking appropriate actions based on the number of people detected.