The only time I ever needed a waiter to explain how things worked was when I ate at a Paula Dean restaurant. That place did not work like a normal restaurant.
People don't order individual meals. You order a meal for the whole table which is then brought out to the whole table to share. They provide unlimited refills of everything. So the whole table has to get together to decide what entree and sides they want. They don't let you take any leftovers home either. Everyone gets butter rolls and a dessert.
If you go to their site you can see the menu but your choices are a 2, 3, or 4 entree meal with 4 sides.
Most "all you can eat" places don't let you take home leftovers. The wat staff will judge how many portions to bring out and if you need more they'll bring it out in order to prevent too much food waste. It worked out really well and there was a lot of food.
Sounds like Maggiano's except Maggiano's is Italian food, and when I've been there they not only allow you to take home leftovers, the wait staff encourages you to ask for more when you're done so you have some to take home.
Fogo de Chao is unusual, too. The options are whether you want the salad bar or not, and what beverage. Otherwise, you have a thing that's red on one side and green on the other. If you want the servers carrying different cuts of meat to stop by to offer you some to put on your plate, you flip that to red. If you're good, you flip to green.