M&R Hotel Management M3 Accounting + Analytics
  M3 Hotel Accounting Macdonald Hotels
  Madigan Pratt Maestro PMS
  Magnuson Hotels Mainstay
  Mainzer Consulting Group LLC Majestic Properties
  Malibu Beach Inn Malmaison
  Mandalay Bay Mandarin Oriental
  Manpower ManpowerGroup
  Mantra Group Manugistics Group
  Marco Beach Ocean Resort Marco Polo Hotels
  Marcus & Millichap Marcus Hotels
  Margaritaville Maritim Hotels
  Maritz Maritz Research
  Market Metrix MarketResearch.com
  Marpac Marquis Reforma
  Marra Marriott
  Marshall Hotels Marshall Management
  Marti Group Massport
  Maxim Hotel Brokerage Maxim Revenue Management Solutions
  Maybourne Hotel Group McDonald's
  MCR Development Mediapost
  Meeting Evolution MeetingMart
  MeetingMatrix MeetingRoomNow.com
  Meetings Industry Association Meetingsbooker.com
  MeetingSource.com MEININGER Hotels
  Meisel Holdings Meliá Hotels
  Memories Resorts Mention Me
  Meraas MeriStar
  Meritage Hospitality Group Meritus Hotels
  Metamend Metime.com
  Mexico Tourism Board Mexinews
  Meyer & Associates Meyer Jabara
  MGM Hospitality MGM MIRAGE
  MGM Resorts International MHI Hospitality Corporation
  MICEpoint Michigan State University
  Micoley.com Microsoft
  Microtel Migis Hotel Group
  Milestone Hospitality International Milestone Internet Marketing
  Millennium Hotels Minor Hotel Group
  Mintek Mintel
  Miramar Miraval
  MIS Computer Corporation Mise en Place
  MJS MKG Hospitality
  Mobil Travel Guide Mobile Media Applications
  Modus Hotels Mohegan Sun
  Molinaro Koger Monarch Casino & Resort
  Monarch Cypress Montage Hotels
  MOON Resort Morgans Hotel Group
  Morongo Casino Resort and Spa Morton’s
  Mosaic Hotel Group Moscow Times
  Mosquito Genie Motel 6
  Mount Meru Hotel Mountain China Resorts
  Moxy Hotels MP&A Digital & Advertising
  MPI MR&H
  MSC Cruises MSNBC
  MTech MultiCultural Foodservice & Hospitality Alliance
  MUSE MustHaveMenus
  MVI Systems MVP Commercial
  My Break Trip mycloud Hospitality
  Myriad Myrtle Beach Area Hospitality Association
  MyWebsite Promotions Mövenpick