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
  Minute Suites Miramar
  Miraval MIS Computer Corporation
  Mise en Place MJS
  MKG Hospitality Mobil Travel Guide
  Mobile Media Applications Modus Hotels
  Moe's Southwest Grill 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
  Motto by Hilton 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