Greece is a country built around tourism, it is extremely friendly and safe. But here are some tips that will make your stay even better Agios Nikolaos is a very small town, having grown up there and with most of his family still living there, Yanni knows a lot of people, shops and restaurants. If you visit some of the stores on the Things to do page, and mention you're here for Yanni's or wedding, they will certainly take care of you. However, most of the people in town know Yanni as John. It was his nickname growing up in town as he was viewed as "The American".
Recently all business in Greece have been mandated to accept credit cards, as a way to avoid tax evasion. But very few business will accept American Express. Cash is king, and most stores around town will offer a discount if they are paid in cash.