Proximity Blue is launching Bluetooth marketing zones in New York/NewJersey-area malls where Bluetooth-wearing customers are instructed to download messages and offers from businesses. “A small to mid-sized business can now have their ad sent out at these high traffic locations and drive traffic to their own location,’’ says Alex Teplish of Proximity Blue.  Floor decals, banners and signage let consumers know about the downloads, and the messages are limited to one every half hour. Once people leave the zone, they no longer receive the prompt. The plan is to expand to malls throughout the country.