A wagering game system and its operations are described herein. In some examples, the operations can include electronically connecting to social network servers for independent online social networks. The social networks provide social network accounts logged on to one or more of the social network servers. The gaming server hosts an online communal wagering game. The operations can further include initiating, based on one or more criterion associated with the communal wagering game, an automatic search across the social network servers for a set of the social network accounts that satisfy the one or more criterion. The operations can further include electronically transmitting, based on search results, an electronic invitation to the set of social network user accounts to participate in the communal wagering game. The operations can further include electronically linking ones of the set of the social network user accounts that respond to the electronic invitation.
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