Among the devices inside were a fridge, digital video recorder connected to CCTV cameras, and a UPS with batteries.
The police suspect the fire was caused by a short circuit.
The Electrical Inspectorate and experts from the Forensic Science Laboratory will investigate the cause of the fire, police said.
Room infested
For about a week, the five employees had been retiring at night at the bar as their room on the second floor was infested with bedbugs and rats.
Published 08 January 2018, 20:17 IST