Greeting someone in Cancun Cancun is a friendly place with greetings being generally informal. Most people address each other by their first names and greet each other with a handshake. Taxi drivers only need to be tipped if they help you with your bags with between about 4 MXP and 8 MXP being sufficient. Daytime wear is cool and casual with suits not being required for business.
Some people prefer to be slightly dressier for the evening.
Hats, sunglasses and sunscreen are recommended for enjoying the sun. The traditional Mexican hospitality allows you to feel at home, so the greeting is friendly and informal. Most men wear long pants when eating in the better restaurants.