Fun Express Mardi Gras Design-a-Room Balcony Background, 30 x 4' Mardi Gras Design-A-Room Balcony Background You can almost hear that jazz music playing on Bourbon Street! Give any room some New Orleans style with this Mardi Gras Design-A-Room balcony background. It's a great way to easily add Mardi Grad decorations to walls at a masquerade ball or other party. Vinyl. 30 ft. x 4 ft. Use your own wall adhesive for hanging.