What strange night jobs are there in Tokyo?

Question:

I need to get in a bit of research about any weird and wonderful jobs that happen through the night in Tokyo for a TV programme. the stranger the better but coming from someone that never been, any information on what happens at night there would be great...avoiding the obvious...hookers, bars etc...
your help would be appreciated soooo much!
I look forward to hearing from you

Answer:

(1) 運転代行 Untendaikou
It might be called "Driving Agency" or something. I'm not sure if there is same job in other countries.
In Japan, you can't drive a car when you get drunk. So a man from untendaiko drives your car for you.
It is more common in local cities. But even in Tokyo, you can see some of them.

(2) Net cafe
Net cafe is a coffee shop with separated personal spaces.
You can stay there all night. Some of them have showers for their customers.
In Tokyo, net cafe works as a cheap hotel actually.

(3) Yatai
Yes, in winter you can see a man selling "Yaki-imo" (baked sweet potato).
You can see some "Ramen" or "Yonakisoba". But they are rare lately.
In addition, I have a little question about selling "Isobeyaki" at Ginza.

(4) Miscs
I have a question about how to change a huge advertisement at Roppongi Hills and so on.

Addition:
There are slot of 24 hour services in Tokyo. You can sing at karaoke, buy something at convince store and have gyuudon. You can buy suit at midnight. I want to know who come to buy a suit at midnight.

Minami
http://www.24open-minami.com/