Perfect for those who daydream about having a pied-a-terre in Paris is 3 Rooms, an 18th century house on the Rue de Moussy whose modest moniker belies the fact that it's a trio of 1,000-sq.-ft. (100 sq m) apartments. The hotel, nestled in the heart of the lively Marais district, is one of several buildings comprising almost an entire block owned by Tunisian-born fashion designer Azzedine Alaïa encompassing the designer's own residence, studio, ready-to-wear store and offices which manager Patrice Brunel describes as "like an Alaïa town."
The apartments each take up a whole floor and...