UK: Birmingham, we have a lot of building going on at present or starting very soon in city centre and in the Commonwealth games site.

Large sites: portakabin with microwave & fridge and kettle and hotplate and fixed tables usually

Interorior refurb in larger office and showroom buildings: again part of a room set up for breaks.

Smaller house extension jobs: this could be the market.

As another poster points out probably a novelty/freebie for sales purposes.