In the hotel industry, the full form of ABC sometimes refers to Ashtray, Budvase, and Cruet.
These items are often part of the table setting, especially in restaurants within hotels. While this isn't a universal standard and usage can vary, this is one possible meaning of the acronym "ABC" in a hotel context. Other possible uses within the broader hotel industry might exist, but the availability of "Ashtray, Budvase, and Cruet" on a table is the most likely.
