I'm not useless, elD is talking to his mate tomorrow.
I'm currently thinking about 3' - 6-8'. Pretty standard banner size. My plan is for it to either go on the outside wall between the two doors or 1/both inside walls.
Possibly should include the quote from the security guard at i41 'You guys are the loudest here by far' (?wording?)
I don't have a particular input on colour, free reign depending on what you had in mind. For me THN == THN Blue, but i know thats a personal favourite.
Colour profiles, will have to wait on any input from elD