Wecloem to Flyertalk and the Starwood forum allenmchan

FWIW, I had a look and found these Starwood hotels that can legitimately accommodate 4 adults in one room :

London : Le Méridien Piccadilly : Club Room, 2 double beds
London : Sheraton Skyline : Family Room : 2 double beds
Paris : The Westin Paris - Vendôme : Presidential Suite.
Paris : Prince de Galles : Mosaic Suite; Appartement Parisien (which is only Eur12,160 per night )
Paris : Le Méridien Etoile : Senior Suite; Executive Suite.