Abstract: In some embodiments, social relationship information indicating social relationships between members of a group may be obtained. As an example, the social relationships may include a social relationship between a first member of the group and at least one other member of the group. Participation information indicating prior participation of the first group member (in prior events/activities with at least one other person with whom the first group member has the social relationship) may be obtained. Based on the prior participation of the first group member and at least one preference of the first group member with respect to participation in the prior events/activities, social-relationship-related conditions (for overriding a preference of a group member in making group recommendations) may be determined. Preference information indicating preferences of the group members may be obtained.

Abstract: A method and system is presented for providing event-attendance-responsive notifications via a hybrid architecture including a computer system and a social networking platform separate from the computer system. As an example, the computer system may obtain, from the social networking platform, profile-related information indicating characteristics of the social networking platform users. The computer system may determine a set of users of the social networking platform that have similar characteristics as one another based on the profile-related information. The computer system may predict that a user of the set of social networking platform users is or will be attending an event. The computer system may cause a notification regarding an attendance status of the user with respect to the event to be presented to at least one other user of the set of social networking platform users as one another.

Abstract: A method and system is presented for recommending an event or activity to members of a group. The system and method may access a group profile that includes preference information for each of a plurality of members. The system and method may determine a group preference based on the group profile, where the group preference is based on a preference of at least one of the plurality of members. The system and method may select, from among a plurality of events or activities, an event or activity for the plurality of members of the group to attend or do. The selection may be based on the group preference. The system and method may further create an itinerary of the event or activity and any planned ancillary services, and may facilitate social media and other services for the event.