One of the most bizarre activities I've heard about is "renting" chairs and umbrellas (for the sun or rain) to pedestrians at the traffic lights of big cities. But I do not know how profitable it is. Because as a rental fee is asked to the user a voluntary offer.
Itinerant IceBar. This is a refrigerator truck used as a bar made entirely of ice and kept at a constant temperature of minus 5 degrees Celsius (-5 C °). Unfortunately I do not know the proceeds of the activity.