Charles- the casino is not in the Chipguide

https://www.britishpathe.com/video/VLVA1SH7C1N5Q0EDBJDMCPJME8W7G-UK-ISLE-OF-MAN/query/casinos
Isle Of Man 1964

FILM SHOWS THE ISLE OF
MAN CASINO AT CASTLE MONA, DOUGLAS. THE CASINO IS OPEN EVERY DAY OF THE WEEK
FROM 2.30 P.M. IN THE AFTERNOON UNTIL 5.A.M. THE FOLLOWING MORNING. STAKES RANGE
FROM I SHILLING TO GBP100 AND MANY GAMBLING GAMES ARE AVAILABLE RANGING FROM
ROULETTE, TO LACK JACK, CRAPS, AND SLOT MACHINES.

THE CASINO OFFERS ALSO BARS AND RESTAURANTS AND A CABARET EACH EVENING.

JUNE 22ND IS DATE FOR TRIAL OF AMERICAN OPERATIONS FOR ALLEGED FRAUD OF MONEY.