Informally known as tipping, in the United States tipping is voluntary. Tips are supposed to be rewarded for services performed as well as a supplement to an employee's income (gratitude). Recommendations for housekeeping - Baht 30 - 60.- per day, Bellman - Baht 30.- per bag and discretionary for above and beyond services provided for you. Disclosure: all gratuities not outlined in the contract are discretionary.