Use a black plastic tablecloth as a background with neon colored streamers in front of it for a fun backdrop for the food table or a photo booth area. You can also use a black plastic tablecloth on the table and splatter paint neon colors on top of it. Cut 3 inch circles out of neon paper. Sew the circles onto thick string to make neon garland to hang up around the party. Add glow sticks to balloons before you blow them up for fun glow in the dark decor. Black plastic garbage bags make a great low-cost solution for covering your windows.