Also found this very interesting article about the early days of Doubletree Club hotels:

http://findarticles.com/p/articles/m...73/ai_4000816/

Yes, Doubletree was considered a luxury hotel brand in those days. Well, at least more luxurious than we are accustomed to these days. Doubletree Club, (Compri in those days) was their entry into the more moderate hotel genre, targeted to women business travelers.