The Wikipedia entry for the Hikawa shrine in Akasaka says it's the one Rei is associated with, and the entry on Akasaka notes it as being north of Roppongi, so that's probably the one in the anime.
And the Hard Rock Cafe scene? Do it do it dooooo iiiiit. ^_____^
And the Hard Rock Cafe scene? Do it do it dooooo iiiiit. ^_____^