Holland Casino. The cocktail bar Joy. Holland Casino Rotterdam re-opened after a complete makeover that created a brand-new nightlife concept. Holland Casino Rotterdam re-opened after a complete makeover that created a brand-new nightlife concept. . The cocktail bar Joy. 7-Purple Bar. Bar idéal pour prendre l'apéritif; Ambiance feutrée, fauteuils et canapés confortables; Large choix de cocktails; Vins rouges, blancs, rosés.