Diplomacy games have become very popular recently. Maybe a standard template should be added like with 1vs1 and 2vs2?
It would require no rules as anyone could join it. It would also have few members. Maybe something like the strategic RP game template I have created several versions of and run a lot.
(Past 24 people game):
http://warlight.net/MultiPlayer?GameID=4052786
(6 player multiday template):
http://warlight.net/MultiPlayer?TemplateID=312403
(6 people real time template):
http://warlight.net/MultiPlayer?TemplateID=312404