Folk Sing Starter Kit, a resource on the website of the Country Dance and Song Society (U.S.).

This guide contains the following sections:

    What Is a Folk Sing? — What this guide covers, what makes group singing fun
    Envisioning Your Event — Questions to ask yourself to get started, event format ideas
    Finding a Venue — Public venues, private venues, accessibility & transportation
    Publicity — How are you going to get the word out?
    How Will Your Sing Work? — Possible structures/procedures, facilitating, group dynamics
    Song Resources — Web sites, sheet music, sound files, books & recordings, podcasts, history

You can also read Julia Friend's blog post about the "kit", here.

This info is certainly not exclusive to U.S. singers!

~ Becky in Hackettstown (lately)