Not real. As they did go to Hollywood, and it looked like they were in the studio, it was Not really the exact same studio office where the sex got shot. The production is very good and they do a great job of mis-dierecting you to keep your fantasy in tact.
Its easy to do. I have shot scene where i was in a store and we go to the back room of this popular store or restaurant and we walk through the door to go fuck in the back room. I cut as we walk through the door and we head to another location with the same looking door and at that location is where the scene gets shot. When the editor gets the footage its easy to cross dissolve and make look seamless.
All in all it was shot very well and edited well. Fooling people into believing what they are seeing is real, is the sign of a great production job.
