Features are disclosed relating to a collaborative ticketing system that manages various aspects of ticketing for events (e.g., movies, concerts, sporting events, and the like) using knowledge about the contacts, friends, and other social connections of system users. The collaborative ticketing system may generate dynamic ticket offers that are based on the number of friends, invited by users, ultimately obtaining tickets. The collaborative ticketing system can also streamline the procurement of concessions and other event-related items by allowing users to pre-purchase such items (e.g., in connection with ticket offers), and then pick up the items at the event venue with little or no wait. In addition, users can preview event-related content (e.g., movie trailers) for event providers (e.g., movie studios), and answer questions or otherwise provide feedback about the event-related content in return for special offers, rewards, and other considerations.