Movies Filmed at Rosewood Hotel Georgia801 W Georgia St, Vancouver, BC V6C 3L2, Canada
The Hotel Georgia is a history hotel in downtown which originally opened in 1927. The building was designed in the Georgian Revival style by architects R.T. Garrow and John Graham Sr. and has been historic building since 1974.
Oliver, Diggle, and Felicity attend the Starling City Cancer Society's annual auction to draw out the Dodger and Felicity ends up getting one of his collars around her neck in episode 1x15 “Dodger”. Felicity and Oliver put on a fake wedding to draw out Carrie Cutter in episode 4x16 “Broken Hearts”.
Koma Grand Hotel
Liv goes to the bar in the hotel where Katty Kupps was staying to investigate and ends up chatting up several different men while trying to resist the brain's horny impulses in episode 3x12 “Looking for Mr. Goodbrain, Part 1”.
Liv sets Clive to distract Gladys Tinkerton while she steals her badge and phone for the heist in episode 5x12 “Bye, Zombies”.
Greyhill Building (interior) 
Sara and Hunter attend an event hosted by Vandal Savage in an attempt to recover Carter's body in episode 1x03 “Blood Ties”.
Les Falies Bergère 
The Legends infiltrate a Nazi-controlled bar after learning that the JSA is in danger in episode 2x02 “The Justice Society of America”.
Source: What's Filming — Twitter
White House 
The Legends infiltrate the White House with a tour group to figure out the time traveler's meddling on to see Damian Darhk is involved in episode 2x05 “Compromised”.
Mick trains Charlie to pose as Rebecca Silver for her big debut but their plan is thwarted when superfan Mona shows up in episode 4x13 “Egg MacGuffin”.
Astra's Club [Hell]
Constantine pays Astra a visit in an attempt to convince her to stop sending evil soul's back to Earth in episode 5x03 “Miss Me, Kiss Me, Love Me”.