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
  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
  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
  Montage Hotels MOON Resort
  Morgans Hotel Group Morongo Casino Resort and Spa
  Morton’s Moscow Times
  Mosquito Genie Motel 6
  Mount Meru Hotel Mountain China Resorts
  Moxy Hotels MP&A Digital & Advertising
  MPI MSC Cruises
  MSNBC MTech
  MultiCultural Foodservice & Hospitality Alliance MUSE
  MustHaveMenus MVI Systems
  MVP Commercial My Break Trip
  Myriad Myrtle Beach Area Hospitality Association
  MyWebsite Promotions Mövenpick