In a word, no.
"All-inclusive" means a hotel-resort that charges one price for accommodations and a meal plan (generally all food and beverage) for week-long stays. It's like a cruise on land.
It's a convenient way to spend a vacation (if you want to spend it entirely in one place), because you don't have to make travel, activity, or dining and drinking decisions several times a day. Everything is included, so all you do is show up at the various restaurants (you usually need to make reservations for the fancier rooms, though the coffee shops and buffets are readily available), eat, and sign your name and room number to the bill. Club Med is an original all-inclusive resort chain, but now there are many throughout the Caribbean and Mexico and in Hawaii, such as Hedonism, Couples, Dreams, Breezes, Secrets, and others.
To the best of our knowledge, there are no Las Vegas resorts that offer all-inclusive packages. Actually, Las Vegas isn't set up for such vacations, since so many resorts are so close together that it's not conducive to staying in one place all day every day for a week. Almost no one wouldn't want to get out and look around town, missing paid-for meals and events at the home resort. Indeed, not even Las Vegas' outlying resorts, such as those at Lake Las Vegas, offer all-inclusive deals.
The closest Las Vegas comes to all-inclusive is the package deal, with airfare and a three- to four-night hotel stay and some combination of show tickets, a couple of meals (usually at a buffet) and drinks. But that's the extent of it.
