"NEW TONE" UPDATE
This is one you just can't make up.
Christian Schneider points out a play where a bunch of lefties get together for dinner once a week to kill a conservative:
In Madison, of course.
Five lefty graduate students in Iowa City gather for weekly dinners to revel in their shared (and sometimes smug) world view. The first dinner we witness ignites a surprising shared mission when one of the students invites the truck driver who offered him roadside assistance to join them. This young man, a patriotic Desert Storm vet, first startles the group when he insists on saying grace before the vegan meal and then goes on to praise Hitler, alarming and repulsing the other dinners. Threats and violence ensue, and one of the hosts stabs him.
As he lies bleeding on an area rug, the quintet, after some debate and initial hand-wringing, decide that they have done society a favor by eliminating him and silencing his dangerous words. They also decide that since participating in protests and sit-ins has been a futile way to fight the power, this new dinner party/murder method may be a more effective technique in coping with right-wing adversaries.
Soon a parade of special guests is invited to dine, and when their dinner conversation proves repellent, they are given poisoned wine and buried in the backyard. Our smarty-pants grad students toast themselves for making a difference each time and feel vindicated when they learn that their first victim, the trucker, was implicated in a heinous crime. The death toll grows, and the tomato plants seen through the patio door flourish.