A few things commonly found in event spaces that you might want to disguise with backdrops: Air-wall tracks or storage spaces, Mirrors, windows, artwork or signs in areas where photos are being taken.

Draped Backdrops: Use them to highlight a special area or hide an unattractive element in your event space.  Helps create a cohesive look with your ceiling drape design, and gives your photographer a nice background for photos.