Hmmmn, I've heard about elevator marketing, basically anything that involves a captive audience. Think about it, if you put up advertising materials in elevators, you basically have the chance to show your ad to the people in the WHOLE office for at least 30 seconds. At different times of the day. This term applies to other areas where you basically have an idle audience: elevators, taxi cabs, buses, lamp posts near areas where heavy traffic is.
So basically, you put up a sticker or brochures into these areas. It could also be a leaflet, a poster and others.
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