Thank you all great advice there I will keep to this advice as I am normally a good Tipperary here in the UK any way the taxi part is something I always do as I know the crappie wages they are on as I did that job while going through college the bar tender will come natural aswell as that's something some people including my self do here will have to remember to do the rest as we have a saying here which is when in Rome do as the Romans which mmeans honour the culture of the country you are visiting its all down to respect.
I can only imagine how confusing the tipping culture must be in the States! It's really different.
I was just in the UK last month and while everyone seemed pretty used to Americans in the touristy parts of London (except for the one hotel concierge who tittered and looked embarrassed when I tried to tip her for storing and retrieving my luggage) it got very different the moment we left.
I had the darndest time trying to tip the hotel maids in Edinburgh, Glasgow, and Belfast. I would leave a couple of pounds each day when I left, and every time I returned I would find it neatly stacked on the bedside table. I couldn't talk them in to taking my money!
I usually tip the following:
20% on the pre-tax restaurant bill
20% on any bar bill
20% of taxi/car fare, rounded up to the nearest whole dollar
$1/person for the hotel maid, plus $1 extra, so $3/night for DH and I
$3 to valet upon retrieving the car (no tip when dropping off)
$1/small bag and $2/large bag for luggage assistance at the resort or airport.
$2 to hotel doorman if they have to work to get a taxi for us (nothing if they just wave forward the next cab in line)
Depending on how you were intending to get cash, you may want to see if you can get some $1 or $5 bills before you go. Most ATMs in the US will give you $20 bills. You can always buy something small at the airport to break a few $20s, or, worst comes to worst, most people in tipped position will understand and help make change for you.
I hope you have a lovely visit!