Opening: a group of people dressed like ancient gladiators approaches tourists and pull them into their show, giving them their swords and posing to photos.
Set up: if the tourist is not assertive enough, he/she gets inside the group of gladiators, who next tell his/her friends to take photos with them. Later, they demand money and will follow the tourist to be given a tip.
Places to be aware of: Colosseum
What to do: be very assertive and decline.