Citations:
1994 Nora Zamichow Los Angeles Times (Oct. 14) “Anxiety 101 Welcome to dorm life in 1994” p. 1: He advises against “dormcest"—involvements with women on his hall. 2005 [Adrian Mailenna] Usenet: alt.sex.stories.d (Mar. 15) “Re: ASSD: Request Help with Story Search on Dorm Sex Party”: Most dorms these days are coed, or segregated by floor (sometimes halves of floors) at worst.…People settle into a reasonably mature boundary-respect inside the first week or two. Floorcest and dormcest do happen, but if they get too active, they’re frowned upon. 2006 Melanie Stetson Freeman Christian Science Monitor (Boston, Massachusetts) (Dec. 28) “In dorms, men and women now room together”: When asked if living together has brought sexual tension into their friendship, Mr. Danzig said “no” flatly, and Dewar said the same, emphatically. Neither report any awkward or indelicate moments, but when both genders use the same bathroom on the floor not much remains secret. Dating neighbors—known as “hallcest” or “dormcest”—is courting disaster given such close quarters, says Danzig.
Reader comments:
“Dormcest” and “floorcest” were definitely in use in ‘93 at the Ohio State University. No citations to offer, but I heard it plenty when I started dating a girl from my floor.