Vending Droids

Imagine near future, overpopulated cities, crowd on the streets... And small
droids rolling around selling stuff on the spot for cash or credit card.
Basically, idea is from the book No time for heroes by Sam J. Lundwall
which I read when I was a kid. Of course, I altered droid's design and instead
of selling snacks and drinks, they sell 'adult' stuff.

There are LoveBot, DrugBot and unidentified AllOtherStuffBot.

You can turn wheels and head and rise lid with alarm system against bu