Located at 506 S Grand Ave, Los Angeles, CA, the luxurious Biltmore Hotel is the location of the fictitious "Sedgewick Hotel", where we first encounter Slimer. The "ballroom" where Silmer was captured is now the hotel's main lobby. The actual entrance, as seen in the movie, is located on 5th St, between S Grand St and S Olive St. It is just 1 block east of the Los Angeles Central Library, and .5 mile west of Fire Station No. 23!