A SERVICE CHARGE OF APPROXIMATELY 10 PERCENT IS ADDED TO MOST HOTEL AND RESTAURANT BILLS. GRATUITIES ARE OPTIONAL BUT GENERALLY HOTEL OR RESTAURANT STAFF EXPECTS THE TIPS. IT'S NOT ALWAYS CUSTOMARY TO TIP TAXI DRIVERS, BUT IF THEY HAVE RENDERED EXCELLENT SERVICE, 10 PERCENT OF THE METERED FARE IS USUAL OR ROUND UP THE AMOUNT TO THE NEXT PESOS. PORTERS AND CLOAKROOM AND RESTROOM ATTENDANTS ALSO EXPECTS THE TIPS.