I thought this may be an interesting thread to collect information on what are general tipping practices. I suppose we all know to tip at restaurants, the bellman and so on. What I find uncomfortable sometimes, especially so at more service oriented hotels, is not knowing who or how much to tip. For example, do you tip doormen, housekeepers, the front desk personnel when they show you the room, what about the floor butlers for simple deliveries, etc? Your thoughts on who and how much? Perhaps you can also specify your experience as it varies by country?