(How do I love thee? Let me count the ways.),
No doubt, years earlier, a much younger Roger Collins had secreted his collection of adult reading material in one of the many closets or desks of the West Wing rooms. Perhaps Roger had stored his entire collection of Playboy Magazines in one of those rooms. (Adam may have found Roger's well-worn 1953 issue of Playboy featuring Marilyn Monroe's historic gatefold appearance in Hugh Hefner's fledgling periodical.)
...An aside: It has been rumored that the mysterious "man in green" was arrested and booked in England but later released for lack of evidence as a suspect in the attempted murder of Ted Jordan. DomSpellcheck = no "gives"
Regarding Adam's squalid West Wing lodgings, couldn't Carolyn at least have sent Harry Johnson up to the room with a broom so that Adam could get rid of all those massive spiders' webs all over the place?
There may have been a few issues of National Geographic laying around