A server transmits information, to a plurality of subscribers having mobile devices, concerning bars or nightclubs located within a predetermined distance from each subscriber. Subscribers receive information concerning special offers available at particular establishments. The system also enables subscribers to identify other subscribers, located at establishments in the vicinity, and to communicate with them. By tracking the location of each subscriber, the system can tailor offers to subscribers who are near particular establishments, and/or who have particular preferences, and it can accumulate data from which to generate statistics which help operators of such establishments to maximize profitability.