Who: Elphaba (and Chistery)
When: Directly after walking out of Ford's room
Where: The rooftop garden
What: Confusion and meditation

( The wicked's lives are lonely )

Who: Malcolm Reynolds and Jack Harkness
When: A day or two after meeting Owen. Evening
Where: Rooftop Garden
What: Conversation

( Stargazing )

Who: Norman and whomever Jack
Where: Rooftop garden
When: Mid-morning
What: An unknowing return to the hotel

( Such a clear blue sky )

Who: Owen Harper
Where: Roof Garden
When: Sunset
What: Decides to go and search the attic for anything connected to people he's met in the Hotel who've disappeared, but he ends up on the roof instead.

( of those who went before )

Who: Owen Harper
When: Late afternoon
Where: His room, then the roof garden
What: Owen decides to go and check the attic for a missing football.

( Please. )