The EventKingdom system allows you to send one invitation (personal link, email oder registration code) which consists of multiple reply options and optionally multiple locations. Recipients can be assiged to all invitations or just one. A good example for this feature is a Wedding invitation with 4 separate invitations: "Rehearsal Dinner", "Church Ceremony and reception", "Wedding Soiré" and "Wedding Brunch". 1 recipient might be invited to all invitations and a different guest to only 1, e.g. the Church Ceremony and reception". The recipient only invited to one, only sees this invitation card, reply option and location info of course.