Question: the Donny & Marie Showroom is located in a hotel operated by which company ?

Context paragraphs:
Cecil Hotel (Alexandria): The four-star Steigenberger Cecil Hotel in Alexandria, Egypt, was built as the Cecil Hotel in 1929 by the French-Egyptian Jewish Metzger family as a romantic hotel, at Saad Zaghloul square where Cleopatra's needles had been, in front of the Corniche.  Author Somerset Maugham stayed here, as did Winston Churchill and Al Capone.  Moreover, the British Secret Service maintained a suite for their operations.  It was seized by the Egyptian government after the revolution in 1952, and five years later the Metzger family was expelled from the country.  In 2007, after a lengthy court battle, legal ownership of the hotel was returned to the Metzger family, who subsequently sold it to the Egyptian government.  This hotel appears in The Alexandria Quartet, written by Lawrence Durrell and the novel Miramar by Naguib Mahfuz.  The hotel operated for many years as the Sofitel Cecil Alexandria Hotel, until it joined the Steigenberger Hotels chain in October, 2014.

Raffles Makkah Palace: Raffles Makkah Palace is a hotel located in Mecca, Saudi Arabia.  The 18-story hotel is a 5-star luxury hotel operated by Raffles Hotels & Resorts, which is under the Fairmont Hotels and Resorts corporate umbrella.  The property is located directly adjacent to Masjid al-Haram, the Grand Mosque.

Kanawha Hotel: Kanawha Hotel is a historic hotel located at Elizabeth, Wirt County, West Virginia.  It is a two story, log core, clapboard covered building which gained its present appearance about 1870 with several frame additions.  The original section was built about 1800, and is possibly the oldest building in the county.  The hotel operated from 1812 to 1928, after which it was sold as a private residence.  Also on the property is a 19th-century well pavilion with a pyramidal roof.

Ibiza Rocks: Ibiza Rocks Hotel is a hotel operated by Ibiza Rocks in the centre of the town of Sant Antoni de Portmany, on the Spanish island of Ibiza.  The hotel is built around a central courtyard with a pool, bar and stage for events in the center.  Formerly called Club Paraiso Mediterraneo, the hotel is on the Carrer de Cervantes, in the central area of Sant Antonio.

Summer Nights (residency show): Summer Nights is the debut residency show by Australian recording artist, Olivia Newton-John.  The show takes place in the Donny & Marie Showroom, at the Flamingo Las Vegas.  The show began April 2014 and is slated to complete September 2015.

B.F. Goodrich Company Showroom: The B.F. Goodrich Company Showroom is a B.F. Goodrich Company showroom located at 1925 S. Michigan Ave. in Chicago's Motor Row District.  The showroom was built in 1911 to sell B.F. Goodrich tires and distribute them to other Chicago retailers.  Christian Albert Eckstorm, a Chicago architect who designed many of the Motor Row showrooms, designed the building.  The Second Empire building features a mansard roof with a terra cotta balustrade, three dormers with terra cotta frames, a partial cornice, and large second-story windows with arched lintels. Like most Motor Row buildings, its architectural ornaments are primarily located near the top of the building.  B.F. Goodrich used the showroom until 1929.

InterContinental Boston: The InterContinental Boston is a hotel operated by the InterContinental Hotels Group.  The waterfront-adjacent 21 story hotel is located at 510 Atlantic Avenue in Boston, Massachusetts.  The hotel contains three food and beverage outlets, 32000 sqft of meeting space, 424 guest rooms, 130 private residences, and the SPA InterContinental.

Dousman Hotel: The Dousman Hotel, is a historic hotel located at the intersection of Fisher Street and River Road in Prairie du Chien, Wisconsin.  The hotel was built in 1864–65 to serve railroad and steamboat travelers through the city.  The hotel was named after Hercules L. Dousman, an early Wisconsin fur trader and land speculator.  The hotel operated until the 1920s; it was later converted to a meatpacking plant.  It was declared a National Historic Landmark in 1960 for its signifance as one of the last grand hotels to survive from the 19th century railroad and steamboat era.  It is now undergoing restoration, its ground floor open as a restaurant and event venue known as the Dousman House.

Flamingo Las Vegas: Flamingo Las Vegas (formerly The Fabulous Flamingo and Flamingo Hilton Las Vegas) is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada.  It is owned and operated by Caesars Entertainment Corporation.

Sheraton Mexico City Maria Isabel Hotel: The Sheraton Mexico City Maria Isabel Hotel, formerly known as the Sheraton Maria Isabel Hotel and Towers, is a business hotel operated by Sheraton Hotels and Resorts and located on Paseo de la Reforma in the Zona Rosa business and shopping district just across from El Ángel de la Independencia in Mexico City.

Supporting paragraphs: Summer Nights (residency show) Flamingo Las Vegas
Answer: Caesars Entertainment Corporation