At events at The Wizarding World of Harry Potter at Universal Orlando, attendees are "sorted" into groups named for the four houses at Hogwarts School and based on lanyard colors (garnet/gold for Gryffindor, green/white for Slytherin, yellow/blue for Hufflepuff and navy/cream for Ravenclaw). The lanyards cost $10 each. For any type of events, lanyard colors can help distinguish attendees from exhibitors, indicate distinct corporate divisions or divide groups for team-building activities. (888) 266-2121; uomeetingsandevents.com