Pizzeria Dos is a pizzeria restaurant that sells two (or, as in Spanish, "dos") of everything, hence the name, as seen in a season 22 sketch. (First: Episode 2842)
Mr. Johnson decides to come to the restaurant and is served by two identical Anything Muppet chefs (performed by Kevin Clash and Martin P. Robinson). He orders only one slice of pizza and one grape drink, but ends up getting two of them, as per the restaurant's catch. When Mr. Johnson says he would need "two of him" to eat all of it, the two chefs pull a Mr. Johnson clone from behind the counter, much to his surprise. After he and his clone faint from shock, the chefs make the best of the situation by enjoying the pizza and grape drinks for themselves.
Even in a rare instance where Waiter Grover is absent, Mr. Johnson still receives the same poor customer service he gets at Charlie's.
The restaurant was referenced by Telly Monster in Episode 2858 when he decides he and his brick are hungry for pizza.