Prices on the ground for hotels and organised tours are often cited in euros. Other costs are usually in Turkish liras (TL).
Restaurants & Bars Usually 10% in restaurants, meyhanes (taverns) and upmarket bars; not necessary in lokantas (eateries serving ready-made food) or fast-food joints.
Taxis Round taxi fares up to the nearest lira.
Hamams Around 10% for the masseuse/masseur in a hamam, but only if you are happy with their service.
Meyhanes At least TL10 per person for musicians in meyhanes.