Service is not usually included in restaurant bills. In pubs or ordinary places, simply round up the bill to the next multiple of 10 (if the bill comes to 83 Kc, for example, give the waiter 90 Kc); in nicer places, 10% is considered appropriate for good food and service. Tip porters who bring bags to your rooms 40 Kc-50 Kc total. For room service, a 20 Kc tip is enough. In taxis, round the bill up by 10%. Give tour guides and helpful concierges between 50 Kc and 100 Kc for services rendered.