It's good to understand the ways in which Great Britain influences the islands in etiquette and customs. Similar to England, the legal drinking age is 18, yet open containers are illegal on the streets, beaches, or anywhere that isn’t zoned for consumption. For the Caribbean, Grand Cayman is quite cosmopolitan. The restaurants encourage smart casual attire, and visitors should be covered up once off the beaches. If you're staying on the islands, be mindful of the days that cruise ships come into port for the day. Places like George Town and Rum Point get crowded from the influx of passengers passing through and make the experience a bit more chaotic.