@Windstruck, one of the more popular intoxicating drinks in the Underdark can be brewed from a blend of local mushrooms. As most of them also have alchemical properties you could get those in more specialized stores. There are a lot of variety to this wine, with different blends of mushrooms used in the fermenting process, as well as different additives. The additives range from particular spices to things like highly diluted spider venom. The additives tend to serve a dual purpose as well, both changing the flavor, but also serving to neutralize a selection of the poisons more commonly used in Drow society.

You remember enough of the brewing process that you reckon you could create a batch yourself. The brewing process is somewhat lengthy (you'd have to start within the next two days or so to be ready in time for the festival), but only requires your direct input at a couple of points, so you could easily work on something else at the same time.

@Elbeyon, careful testing on the first row of tiles in front of you reveals that all of them have some kind of pressure plate or mechanism below them, as they start depressing slightly when pressure is put on them), though you can't access the mechanism without some way to remove the tile. However, you note that of the 5 tiles, 2 (the one on the far right and the one one tile from the left wall), have slightly more resistance to being pushed down. You're not certain whether this is an indication of them being trapped, or of them not being trapped, however.

There is absolutely no sign of any mechanism to turn off the traps at this end of the hallway.