We all know that adventures can be a bit tiresome at times. You kill one orc, you've killed them all. Or you see one dungeon, you fly in one citadel...
Amidst all this trouble, barbaric environment and companions, it is necessary to maintain a certain standard of living. Instead of napping in a dank sleeping bag you can, as a Shadow Sabre, show some class by having a topnotch meal and use the instruments available at Guild Store to make the Realms a bit more pleasant place for a short while. You will find yourself strangely recovered and refreshed.