2. The computer-implemented method of claim 1 , wherein selecting the subset of the one or more other client computing devices to invite to participate in the communication session comprises: determining which of the one or more other client computing devices are associated with the digital content item; and selecting the one or more other client computing devices are associated with the digital content item.
2. The computer-implemented method of claim 1 , wherein selecting the subset of the one or more other client computing devices to invite to participate in the communication session comprises: determining which of the one or more other client computing devices are associated with the digital content item; and selecting the one or more other client computing devices are associated with the digital content item. 3. The computer-implemented method of claim 2 , wherein determining which of the one or more other client computing devices are associated with the digital content item comprises: determining whether the one or more other client computing devices have interacted with the digital content item; determining whether one or more users associated with the one or more other client computing devices, respectively, have a proximate geographic association with the digital content item, wherein the proximate geographic association comprises a distance less than a threshold distance between a location associated with the digital content item and a location associated with the one or more other client computing devices; determining whether the one or more users associated with the one or more other client computing devices have been tagged in association with the digital content item, wherein being tagged in association with the digital content item comprises one or more pieces of metadata that identify a user; and determining whether the one or more users of the one or more other client computing devices have specified an interest in a topic associated with the digital content item.