ATMs are widely available, though most ATM withdrawals using out-of-state cards incur surcharges of $3 or so. Major credit cards are widely accepted.
Tipping is standard practice across America. In restaurants, tipping 15 to 20% of the bill is expected; only tip below this if the service was exceptionally bad (not tipping is a very drastic move).
Food Normal service 15%, good service 18%, great service 20%
Bars $1 per drink, $2 or more for complicated cocktails
Taxi drivers 10% to 15% of fare
Porters and skycaps $1 per bag
Hotel cleaning staff A few dollars after a few nights