An event based service provides services and/or products based on an event. Services/products are made available to persons attending an event. Services, products, and/or advertisements can be made available to persons via wireless mobile communications devices. The services/products can be made available to persons attending an event. Services/products can be made available while the event is occurring. Additionally, advertising space is auctioned allowing the ability to bid for advertising space for advertising services/products via the event based service. Individual providers can offer services/products to a group of people at the same location, and at a time that people may be most interested in the services/products. Access to the event based service can be via service provider offered access points. An individual provider's device can act as a server that enables services/products to be purchased. An individual provider's device can act as a network gateway that enables services/products to be purchased.