This happened during the ships’ last service, and the Oasis of the Seas Allure of the Seas, and Harmony of the Seas are ready to welcome all players who are interested in playing in a smoke-free environment. Building the First Three Oasis Ship Casinos for Royal Caribbean Royal Caribbean previously decided to suspend smoking across its other ships back when COVID-19 was around as a measure to improve air filtration and suppress the virus’ chances of spreading. This decision impacts three Oasis-class ships that have seen their jazz clubs converted into smoke-free casinos. Royal Caribbean International, a company that provides cruise ship travels and hospitality services, including on-board casinos, has decided against smoking onboard.