Lily wakes up in Barney's bed. Marshall hangs out with Brad and they take part in couple-like activities, to Ted and Robin's amusement.
screencap
how i met your mother
season 2
episode 5
world's greatest couple
screencaps
This How I Met Your Mother screencap contains
bookcase, library, bookshop, bookstore, and bookstall.
There might also be
athenaeum, atheneum, and reading room.