Team members take turn on housing a “dinner party”.
It can be as formal or informal as the team decides.
In the tv-series “Dining with stars” the host must arrange a meal (1-3 courses), and some entertainment. The guests take the opportunity to get-to-know the host, and ask curious questions on background, life choices, hobbies, etc.
After each evening, the guests rate the host on quality of the meal, entertainment and host hospitality.