Almost all hotels will add a 10% to 15% service charge to your bill. Most restaurants include a 10% service charge, which is considered standard on these islands. If it isn't on the bill, tip according to service: 10% to 15% is fine. Cabbies expect a token tip of around 10%. At drinking establishments tipping is optional, and the staff at smaller bars may tell you on your way out that you forgot your change.