Marriott International in Europe will double in size once its acquisition of Starwood Hotels & Resorts is complete.  In Europe, the company will reach over 123,000 opened or signed rooms when Marriott’s 61,000 open rooms join with Starwood’s 40,500 open rooms and the combined pipeline of 21,500 rooms. Starwood’s luxury brands, including St. Regis, Luxury Collection and W Hotels, will …