Camp Forlorn Hope barracks
This is the sleeping quarter for the NCR troopers. Private Sexton and a few NCR troopers can be found. After finishing Three-Card Bounty, 1st Recon will move to Camp Forlorn Hope and Sergeant Bitter-Root and Corporal Betsy will be found in the barracks. There's also a poster of Super-Duper Mart. The beds are owned and you cannot sleep there.
The Camp Forlorn Hope barracks appears only in Fallout: New Vegas.