A social interaction system has a server executing software coupled to a data repository storing member profiles, portable appliances used by members, and executing GPS, and an application providing interactive interfaces on a touch screen of the portable appliances, wherein the system stores pre-programmed geographic regions by GPS coordinates, and wherein, upon a first member becoming active by logging into the application using the network-connected portable appliance, the system invites the first member to select one or more interests presented in an interactive interface, and upon the user selecting one or more interests, indicates to the first member an on-screen identifier for other members who are both active in the same region, and who have selected an interest common to one of the interests selected by the first user.