Techniques are provided for facilitating participation in nearby user-relevant social groups for a mobile device. The mobile device is associated with a user profile which includes one or more user interests of a user. The mobile device sends a request for identifying social groups in a mobile geographic location. Each social group is represented by a social group profile which includes a social group name, one or more social group interests, and a social group geographic location. In response to the request, the mobile device receives data identifying a plurality of social group profiles corresponding to a plurality of social groups in the mobile geographic location. The mobile device presents a list of the social groups based on the received data. The list of the social groups is ranked in accordance with similarity scores produced between the user and each social group. Each similarity score is produced based on both a proximity identified between the mobile and social group geographic locations, and similarities identified between the one or more user interests and the one or more social group interests. In response to receiving a user input for entering into one of the social groups, the mobile device may enter into the social group and present a chat session interface for a chat session for the selected social group.
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