"Megagames"

Megagame Makers is a UK-based group that creates and runs very large scale wargames for entertainment purposes, usually based on military conflict represented on boards or maps, but sometimes dealing with negotiation simulation. See the description of their Washington Conference simulation (which they will be running again in November 2007) for an example of a negotiation simulation not too far removed from the seminar-style games I'm trying to focus on here at A Horse of Peas. Their downloads page also offers the basic handbook for their Congress of Vienna game, another interesting negotiation simulation. This group has been around for a while, and looks well worth checking out for anyone in the SE England area.