Some companies sell an entire restroom. For example, if there are a half-dozen billboard spaces in a restroom, they are all sold exclusively. A company can, however, use different art or promote different products. Ads are mounted, often in frames, and installed. Indoor advertisers produce the posters, install and maintain them.
Timelines vary with number of markets and art production.
AJ needs four to five business days to get the boards up, with a three-week lead time to choose locations and print and mount ads. American Indoor needs three days installation time for every 100 locations. Some indoor companies use sophisticated computerized tracking to verify ad postings. They re counting the number of dinners served, they re scanning health club cards. In a bar or health club you get almost 100 percent visitors to the bathroom at some point.