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.
A rumour of the knights of some powerful king that sleep until danger threatens the kingdom.
The truth is that they were rebels, trying to split the kingdom. Once captured they were put into an enchanted sleep, protected from age and harm, until their aims have been carried out by others in which case they will awaken.
There is a loophole in the spell in that trying to take one of their weapons will also awaken them.