Mystery Sign

Photographed at a Lowe's in Framingham--I figure it likely has to do with the fire suppresions system, but I'm still quite puzzled. Specifically, I figure that the signs differentiate between dry pipe and wet pipe systems (quotes below from this website).

Wet pipe systems are the most common sprinkler system. As the name implies, a wet pipe system is one in which water is constantly maintained within the sprinkler piping. When a sprinkler activates this water is immediately discharged onto the fire.

A dry pipe sprinkler system is one in which pipes are filled with pressurized air or nitrogen, rather than water. This air holds a remote valve, known as a dry pipe valve, in a closed position. Located in a heated space, the dry-pipe valve prevents water from entering the pipe until a fire causes one or more sprinklers to operate. Once this happens, the air escapes and the dry pipe valve releases. Water then enters the pipe, flowing through open sprinklers onto the fire.

This basically makes sense to me--the outdoor parking lot could freeze up, so you would want to use a dry pipe system. But why the heck are you running fire spinklers in the parking lot?

Alternately, maybe it just means that alcoholic beverages are served on the sales floor, but you can't bring them out to the parking lot.