Casual, but presentable.
There is not any particular dress code.
There isn't one.
No dress code
Something confortable so they can screw you easier
I would say dress like your going to to the movies. a pair of clean blue or black jeans, a clean t-shirt or long sleeve with no stains or holes, colder weather wear a clean sweater or jacket thats free of writing thats offensive. and for the love of all things smelly TAKE A SHOWER!! i hate that i have to say that.
Business Casual... Look proper, not slopper.