An informative article about the casinos in Aruba. Some Aruba casinos are open 24 hours, and others open at 11:00 a.m. for slots and 1:00 p.m. for games and remain open until the wee hours of the morning. Gambling in Aruba casinos is done with U.S. currency, but the payouts are seldom as spectacular as what you'll find in Nevada or New Jersey.