A method of upselling ordering items includes: in response to detection of a patron at or approaching an ordering terminal, capturing N sets of identification data for the patron using N passive patron identification systems, respectively, wherein N is an integer greater than one; calculating an overall confidence value indicating a level of confidence that the patron is associated with a unique patron identifier based on N comparisons of the N sets of identification data with N sets of stored identification data, respectively, associated with the unique patron identifier; based on the unique patron identifier, retrieving stored data indicative of an ordering item that is to be subliminally suggested to the patron during ordering; using the ordering terminal, displaying an ordering menu; and, when the overall confidence value is greater than a predetermined value, subliminally suggesting the ordering item to the patron while the patron places an order.