Dinner Party for an Alternate Universe

After Yoko Ono

Invite your friends to a dinner party at your house or apartment.
Try to invite the most unlikely group of friends you can.
It is best when none of the attendees know each other.
(They’ll all know you, because they are your friends, but try to arrange a party where you are the only person each of your attendees knows.)

At the dinner party, ask everyone to reminisce about the times you all shared together.
Be clear that all fond memories shared must be memories of events in which everybody present took part.
There are, of course, no such events, because none of the people here know anybody else at the party (except you).
Do not let this stop the reminiscing.
Get everyone involved.
The dinner party does not end until everyone at the table has shared at least one reminiscence.
(You can raise the number of required reminiscences per person, if you’d like).

Serving alcohol will help with the flow of conversation and encourage buy-in, but try to make sure no one gets too drunk.
That will ruin the mood.
(The definition of “too drunk” depends entirely on your preferences.)