It is a circular metallic blue building with a black roof and a green wooden sign held together by bamboo sticks that reads the place's name, with the "Tough" part read in red text and the "Tavern" part read in black. There are many motorcycles parked outside.
The inside resembles a bar and is known to contain a pool game.
Plankton goes here to attempt to make the people in the Tough Tavern join him to steal the Krabby Patty secret formula. He fails and gets seriously injured by the tough fish inside.
"SpongeBob Meets the Strangler"
SpongeBob goes here to see if the people at the tavern can be his bodyguard to protect him from the Tattletale Strangler. However, everyone at the tavern is also afraid of the Strangler and they run out of the place in fear.
Creature from the Krusty Krab
It appears in the sixth level, "Revenge of the Giant Plankton Monster," where it is one of the many buildings Plankton has to destroy.
It is similar to The Salty Spitoon, as both are bars that involve tough fish as members.