WC/Loo==Rest Room in public buildings
Needs to know "knock up" so it's not used at the wrong time.
Hot & cold water come premixed out of the same tap.

Mixed drinks aka cocktails are not as popular as they once were and they are expensive, but they are typical. If you hit a city or suburban bar during 'happy hour' right after work time @5:00-7:00 they are often cheaper. Margaritas are popular, but are sometimes huge so be careful.

'Typical' food is frequently ethnic based. In our area that means lots of Italian-American; Chinese-American is everywhere; Mexican or Tex-Mex also in many places.

You won't be able to completely avoid the fast food places. If you're driving & looking for a clean rest room they are usually a pretty safe bet. Get french fries at McDonald's.

I did Disney World with my sister & her family a few years ago & had much more fun than expected. Staying on site was expensive, but meant early admission to the parks & very frequent buses to move us to & from. If someone just got too tired it was easy to go back to the room while the rest kept going. We did the dinner shows too. Also expensive, but the Hoop-Dee-Doo Musical Revue was good family fun & typically American food.