Theme park holiday? You mean Disneyworld? Aw, Keith!!You can do better than that!!
We eat many of the same things you do, only they look a little different: steaks, potatos, salads, bacon and chops, etc. Not to worry, it's all edible.
We drink very poor beer, but California wines are all right. Stick to Guinness unless you have a chance to explore some of the microbrewery products becoming more popular. Mexican beer -- Dos Equis for example - is pretty good. But expect beer to be served cold, not at room temp. We drink a lot of water, Cocacola and Pepsi as well.
We drive on the right here, BTW. Use your turn signals. As a rule you can stretch posted speed limits by 5 mph without much risk unless you're in a little backwater town that really needs the money. Wear your seat belts when driving. Stay alert for drivers who abandon all pretense of humanity once their gears engage -- a minority but significant. Don't get sucked into altercations with strangers over driving habits, no matter the temptation.
We use central heating and individual plumbing; you are probably used to doing it the other way 'round!
A.