Nore,
Sounds like the sort of environment in which you can pretty much make your own choices. If there are only three dudes in the whole organization who outrank you then you are highly placed enough within the organization to mostly chart your own course.
If I were you I would try to not outdo your 'superiors' by too terribly much at work.
But throw that shit down in your social life and during those work related occasions when it is appropriate to 'put on the dog'.
But honestly it sounds as if you already have this figured out.