According to hotel size Small---up to 100 rooms(eg: Gritti Place in Venice. 99 rooms Medium---100 to 200 rooms Medium-large---200 to 500 rooms Large---over 500 rooms (eg: Hyatt Regency in Chicago, over 2000 rooms; the Hotel Rossya in Moscow, 5300 rooms)1.According to hotel size Small---up to 100 rooms. (eg: Gritti Place in Venice, 99 rooms) Medium---100 to 200 rooms Medium-large---200 to 500 rooms Large---over 500 rooms (eg: Hyatt Regency in Chicago, over 2000 rooms; the Hotel Rossya in Moscow, 5300 rooms)