Sheraton is an 8-letter popular hotel chain that was founded in 1937. It is a part of the Marriott International group and has over 500 hotels in 70 countries. OMNI is a 4-letter popular hotel chain that was founded in 1958. It is a part of the OMNI Hotels & Resorts group and has over 60 hotels in the United States and Canada. Holiday Inn is a 10-letter popular hotel chain that was founded in 1952. It is a part of the InterContinental Hotels Group and has over 3, 500 hotels in over 100 countries.