The Full Goblet is a modest-sized, working-class tavern (public house), run by Hilgar. Hilgar is a bit over the hill and shabby, as is the general establishment. However, good solid fare at a decent value, and a regular and noisy clientele, keep the place in business, and the bar is also well-situated to bring in travellers.
Real world scientists have accidentally opened a tear in the fabric of reality, transporting their laboratory into the game world. Unable to repair and/or refuel their equipment in this (to their minds) primitive world they are now trapped.