Maritim Hotelgesellschaft mbH · 32105 Bad Salzuflen
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InterContinental Hotels Group · D-60329 Frankfurt am Main
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InterContinental Hotels Group · D-60329 Frankfurt am Main
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InterContinental Hotels Group · D-60329 Frankfurt am Main
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QGD Hotelmanagement · D-60598 Frankfurt am Main
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Regus Business Centres · D-40549 Düsseldorf
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Radisson SAS Hotels & Resorts · D-20355 Hamburg
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TOP City&CountryLine · D-40221 Düsseldorf
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TOP International Hotels & Corporate Partners · D-40221 Düsseldorf
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Golden Tulip Hotels, Inns & Resorts · NL-3818 Amersfoort
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T C L TOP Conference Line · D-06796 Leipzig/Brehna
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NH Hoteles Group · D-10117 Berlin
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Dorint Hotels & Resorts · D-50858 Köln
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Novotel Hotels · D-81829 München
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CPH Hotels · D-22041 Hamburg
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Hyatt International Hotel & Resorts · D-10785 Berlin
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Mercure · D-81829 München
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MÖVENPICK Hotels & Resorts · CH-8134 Adliswil
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LINDNER Hotels & Resorts · D-40547 Düsseldorf
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STEIGENBERGER Hotels & Resorts · D-60528 Frankfurt
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Van Der Valk Hotel Berliner Ring · D-15827 Dahlewitz
Hotel Gladbeck van der Valk · D-45964 Gladbeck
Motel Moers van der Valk · D-47447 Moers
TheaterHotel De Oranjerie in Roermond · NL-6041 JA Roermond
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Best Western Hotels Deutschland GmbH · D-65760 Eschborn
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Swissotel Hotels & Resorts · CH-8050 Zürich

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Welcome Hotel Ruhr Residenz · D-45127 Essen
Welcome Hotel Diemelsee · D-34519 Diemelsee-Heringhausen
Welcome Landhotel Waldwinkel · D-33181 Bad Wünneberg
Welcome Hotel "Alte Post" · D-59929 Brilon
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Mardavall Hotel & Spa · E-07181 Costa d´en Blanes - Calvi
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RAMADA-TREFF Hotels & Resorts · D-34454 Bad Arolsen
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Morada Resort · D-18225 Kühlungsborn
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Günnewig Hotels & Restaurants · 40212 Düsseldorf
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Hotel Alsterhof Berlin · D-10789 Berlin
Grünau Hotel · D-12526 Berlin
Schlosshotel Burg Schlitz · D-17166 Hohen Demzin
Hotel Cordes · D-27607 Langen-Sievern
Hotel Freizeit In GmbH · D-37079 Göttingen
Ambiente Hotel-Restaurant Dortmund · D-44143 Dortmund
Grandhotel Bochum · D-44791 Bochum
Hotel Eichenhof · D-48268 Greven
Residenz Hotel am Festspielhaus · D-45657 Recklinghausen
Sport- und Tagungshotel Grefrather Hof · D-47929 Grefrath
Sporthotel De Poort · D-47574 Goch
Waldhotel Eskeshof · D-42115 Wuppertal
ABEO Seminarhotel Goldener Acker · D-51597 Morsbach
Amber Hotel Bonn · D-53115 Bonn
Hotel Moselpark · D-54470 Bernkastel-Kues
Land & Golf Hotel Stromberg · D-55442 Stromberg
TREFF Hotel Bad Herrenalb · D-76332 Bad Herrenalb
Hotel Hirschen · D-79274 St. Märgen
Parkhotel Egerner Hof · D-83700 Rottach-Egern
Landidyll Wald- und Sporthotel Polisina · D-97199 Ochsenfurt
OFRA Resort Hotel Mallorca · E-07181 Portals
Hotel Sonnenhügel Bad Kissingen · D-97688 Bad Kissingen