Tipping isn't a big part of Hong Kong culture. Hotels and restaurants usually add a 10% service charge; however, in almost all cases this money does not go to the waiters and waitresses. In restaurants, add up to 10% more for good service, or simply round up the tab. In hotels, tip bellhops and other helpful staff members. Tipping restroom attendants is common, but it is generally not the custom to tip taxi drivers.