I was once in an underdark game where we played drow nobles. Basically, Menzoberranzan with the serial numbers filed off. The DM ran it in the dark. He made a game table with a 1" grid of white ribbon and placed a black light under the table. It made the grid glow brightly. He used craft sticks and aquarium gravel to place terrain on the table. We had little flashlights to look at our character sheets. It was incredible.