Navy marines and police who arrested the gamblers also seized casino chips and B66,660 in cash in the raid, just before midnight.
Royal Thai Navy Cmdr Pornphrom Sakoltem ordered the hotel to shut down while the management's involvement in the makeshift casino is investigated.
It was the second raid of the night. At 10pm the same task force, acting on a tip-off, raided the house on Soi Ruamjai in Koh Kaew, seizing casino chips and B21,800, and arresting 10 gamblers.