Tipping in America is simply the done thing.The custom of tipping for most services should be adopted when in America, despite what you are used to at home. The following is a top 5 guide to tipping for anyone visiting this beautiful country.
1.   Have some dollars ready. When you are in the currency exchange, make sure to ask for a certain amount extra to allow for tipping. You should really carry an extra $10 in $1 dollar notes at all times. This will make it easy to give whatever value of tip you want without having to ask for change. Although asking for change is quite common also so don’t be embarrassed.
2.   Bars. It is common to tip around a dollar a drink at the bar but if you are ordering three or more drinks then you don’t have to keep to the $1 per drink rule, just give a reasonable amount. A 10% bill should be added to the total if you are served your drink sitting down by a bar man or lady
3.   Restaurants. This one is really determined by the version of eating joint you are at. Cheaper take-away style places only really should be tipped maybe 15% whilst more up market eateries should be tipped at a rate of around 20-25% of the bill.If the staff go the extra mile for you then you should really thank them by tipping a little extra for their work.
4.   Bags.The porter who brings the bags to the room will probably be expecting tip of one dollar per bag. This will be the same at most hotels, health spa resorts and serviced villas alike. This quite a strong rule of thumb but you can always tip more if the service was great or there was a lot of effort involved for the porter. Airport bag carriers should be tipped around 2 to 4 dollars per piece of luggage
5.   Poor service. If you are not happy with the standard of service then don’t feel you have to tip. But make sure you express your reasons. Constructive feedback is generally appreciate in the USA and the people you give it to are rarely offended. If you have poor meal or you don’t like the beauty products used during a visit to a health spa for example, speak up and let them know where improvements can be made.