The Las Vegas Strip

Yes. Casinos on the Strip are open to anyone, and nobody checks whether you're a guest. You can walk in off the sidewalk and use the restroom without spending a cent.

Off the casino floor, and usually clustered in three places: near the hotel lobby and check-in desk, near the food court or restaurant row, and by the theatre or event space. Follow the overhead signs — every property signposts them, and staff will point you if you ask.

Think of it as two journeys. Getting to the front door of a casino is one — adjacent properties are five to fifteen minutes apart, and each pedestrian bridge adds another three to five. Then finding the restroom once you're inside is another five to ten minutes, because the buildings are enormous. If you're already inside a casino, the restroom in that building is almost always closer than the one next door.

Yes, and the pharmacies are the most useful. There are several Walgreens right on Las Vegas Boulevard and all of them are open 24 hours, including ones at Miracle Mile Shops, the Grand Canal Shoppes, near Resorts World and near the Sahara. There are 24-hour CVS locations too, including in front of Bally's and next to Park MGM. The shopping centres and food courts along the Strip all have them during opening hours.

Effectively everything. Casinos run 24 hours and so do their restrooms, and the Strip pharmacies are 24 hours as well. This is one of the few places where the middle of the night is no harder than the middle of the day.

Tap the ADA filter for accessible locations near you. Worth knowing for planning: the pedestrian bridges over Las Vegas Boulevard have both elevators and escalators, so you don't have to cross at street level to get between properties.