Guoman Hotels Guoman Hotels is an exclusive collection of luxury hotels in London: Grosvenor Hotel, Cumberland Hotel, Royal Cavalry Hotel and Tower Hotel. While these central London hotels vary by their unique identity and style, each offers guests the same high level of comfort and service. From exclusive access to the Club Lounge to panoramic views of the capital, Guomen Hotel's beautifully designed standalone suites and executive rooms are more than an upgrade.