Frank Chalfant's book " Galveston Island of Chance" Lists the Idle Hour Club as 1903 23rd St., Galveston, owner/operator, John F. Moriarty and Harold haven. Was one of 47 night spots listed in the June 11. 1957 injunctions. Gambling ( slot machines and Blackjack) and Liquor.

So it is quite possible. The book doesn't show any pics of chips, but contact Ed Hertel to see if he has any newer info.