Abstract: In some example embodiments, organizer requests of different organizing-users and comprising corresponding numbers of seats and at least one guest-user can be received for an event. Guest requests of guest-user and comprising corresponding numbers of seats for the event can be received. A plurality of groups and subgroups can be determined based on the number of seats for the organizing-users and guest-users, with each group in the plurality of groups corresponding to a different one of the organizing-users and comprising a corresponding plurality of subgroups. Seats for the event can allocated to the organizing-users and the guest-users based on their corresponding number of seats and an iterative optimization algorithm, with the iterative optimization algorithm being configured to determine an allocation of seats for the event based on calculated distances between seating positions for each group.