The only thing on the walls of my base for the last five years have been USAF-issue framed photos of aircraft we will never have, aircraft we once had, the mandatory bulletin board in each building with wing info (KNOW YOUR CHAPLAINS, etc), motivational posters, and the current FPCON.
Prior to that I was in the Army Guard for six years. I never saw anything like that there, either, and I was in an infantry company. Maybe pinups are less popular in New England, I don't know.