That depends on what you want to achieve and what your culture can handle. For a structured organisation, a concept theme often works well (Mad Men, Casino Royale). Creative companies flourish with world themes (Marrakech, Tokyo by Night). Teams that have just been through a change benefit from a time-travel theme that celebrates connection.
Important: don't choose the theme you like. Choose the theme that takes your colleagues out of their comfort zone in a fun way.
Want to know more about choosing a theme? Read our full article →