Grillby's

 is a pub located in Snowdin. It is named after and run by Grillby, a monster made entirely of fire.

Many different monsters, such as the Royal Guard, can be found relaxing, playing cards, and talking. Sans is the most famous regular, even having a tab.

Location
is one of the many buildings in Snowdin, located to the right of the Snowdin Library and left of Papyrus and Sans's House.

Description
contains a couple of booths, tables, a bar and a broken jukebox. As mentioned above, it contains a variety of NPCs, from Big Mouth to Punk Hamster, including much of the Royal Guard if they are spared by the protagonist before reaching Snowdin. The members of the Royal Guard that hang out in include: A full list of the monsters in can be found here.
 * Lesser Dog
 * Greater Dog
 * Doggo
 * Dogamy and Dogaressa

Neutral and True Pacifist Route
After sparing Papyrus and making it to the entrance of Waterfall, Sans will ask the protagonist if they want to go to, as he's on one of his "legally required work breaks. " If the protagonist agrees, he'll tell them to follow him, as he has a shortcut, and will proceed down the path the protagonist would take to proceed in Waterfall, which "transports" him and the protagonist to.

Upon arrival, Sans is greeted warmly by the many patrons as he takes a seat alongside the protagonist at the bar, and asks the protagonist what they want, giving them the option of getting a burger or fries.

Now, while waiting for the protagonist's food to arrive, he begins to strike up a conversation, asking the protagonist whether they think Papyrus is cool. Grillby brings the protagonist and Sans the dish that the protagonist had chosen at the beginning of the discussion. Shortly after, Sans asks the protagonist if they're going to need the ketchup for their food. Once again prompting a choice by the protagonist, they can either choose "yes" or "no". Sans then goes on about how Papyrus had begged Undyne to allow him to join the Royal Guard, and the "training" he was receiving from Undyne.
 * If the protagonist says yes, they will take the ketchup and attempt to add some to their plate, but the cap falls off and ruins their food. Sans will then say the protagonist can have his food instead.
 * If the protagonist says no, then Sans will say that it means that there's more for him, and proceeds to chug the entire bottle in one sitting.

Afterwards, he tells the protagonist that "i wanted to ask you something. " All action in the room seems to freeze, all light focuses on the protagonist and Sans, and "Premonition" begins to play in place of "sans.". Sans then goes on about how Papyrus had been getting advice, encouragement, and even predictions from a talking flower, but brushes it off as he felt it was simply an Echo Flower being used to play a trick on Papyrus.

Afterwards, Sans will say that he needs to get back to his post, as the protagonist had "held him up" and asks if the protagonist is willing to pay the 10000G needed for the meal, prompting yet another yes/no question. However, no matter the protagonist's response, Sans will say that he's just joking, and will tell Grillby to put it on his tab. He will then begin to leave, start a sentence but then forget what he was going to say.

If Papyrus was killed instead of being spared, the monsters will complain that Sans isn't showing up, and this scene will never take place.

Genocide Route
The entire building is entirely empty, as all of Snowdin had been evacuated at this point. Sans is nowhere to be seen.

Trivia

 * Papyrus states that Sans usually eats out every night, and only recently began attempting to cook. It can be assumed that would be the "out to eat" that Papyrus was mentioning.
 * There's a "fire escape" to the left of the bar, which cannot be reached unless the protagonist has killed Lesser Dog. However, the protagonist cannot use it as they are "not made of fire". This implies that the exit was made for the owner, Grillby, only.
 * Grillby is either mute, speaks a different language than other monsters, or is simply not talkative. This behavior is revealed after the True Pacifist Ending when the red bird, who usually speaks for Grillby, says "I might not get to translate for Grillby anymore..." However, Grillby says "................... good job."

Grillby's