Why are there American Indians in Greece?

We were walking around Old Town Rhodes which is the oldest inhabited medieval fortress in Europe. As we were walking around we saw a big crowd gathered so we stopped to see what was going on. We thought there would be some medieval renactment going on like knights fighting or something. But to our surprise everyone was gathered around to see native Indian Americans! We're not sure what they were doing there in Greece but the crowd was really into it. We wondered if we started using our old IASA show skills and did a mini-Raas Garba if we'd get the same reaction! I'm not sure if the crowd knows this but since there was more than one "native American-Indian" there they could've just been Puerto Ricans dressed up in feathers.