Correct category for my gig? Holding banner signs in New York City

[nycweb]

I have a new and super exciting new gig.
http://www.fiverr.com/s/8v85ym

It is getting pretty popular in short amount of time. I get a lot of private messages and just received a handful of orders.

My question is which category do you think is more suitable for my gig?

There are a few categories that are very similar to each other and I am not sure if I am allowed to post the same gig under multiple categories. Do you think people prefer searching through categories or keywords?

Any direction / help / positive criticism is appreciated. 🙂
Thank you
Frank