I'm booked on to a trip, that leaves out of Florida. Speaking to friends i have heard that a 15-20% tip can be the norm for customer service in the US. 15%-20% on a $3000 trip is a hell of a lot of money to me when taking the total trip cost (international airfare and hotels) into account. Are these fee's a hidden cost in US culture that i should have budgeted for or is acceptable to just give what i can afford?
Here in the UK if someone asked for a specific amount for a tip, i'd be offended, tell them to stop being so cheeky and probably leave less.