Sorry for the late update on this - I was in fact able to use the VS lounge in LAX by flashing my gold card. Smallish lounge but fantastic cocktails and table service, food was great too, and located right next to the gate for the flight. Also used the VS lounge in LHR - which was fantastic, possibly the best I've ever been in (you can drink famous cocktails from around the world wearing a VR headset so it give the impression you in said cocktails bar)