From June to November 1962 Mitsui leased "Dominion Monarch" as a floating hotel and entertainment centre for Seattle's Century 21 Exposition, along with the Mexican-owned "Acapulco" and Canadian-owned . She arrived at Seattle on 29 May 1962. The onboard hotel was managed by Western Hotels. Accommodation demand was less than predicted, "Dominion Monarch"s US charterer lost $200,000 and her charter was reduced by several weeks. The exhibition closed on 21 October and the ship arrived in Osaka, Japan on 25 November to be scrapped.