Claire, I have attached a brochure I put together for the contra dance in Deerfield, NH, for which I took on the responsibility of chief organizer this season. I am proud to say that this dance has doubled its attendance since last season, from what had been an average of 35 dancers, to now consistently drawing 70. I attribute our success to linking our monthly dances to meetup groups -- online groups, typically of single people, looking for events of all kinds where they can be active and meet others. The one issue I had with these particular newcomers was that they were unfamiliar with contra dance culture, so that there were some minor instances of bothersome behavior which indicated a need for providing basic information. I did a bit of investigation online about what other dances around the country had in place to address similar concerns, and I also polled my experienced dancers about what they considered important to include. The end result of my efforts may be a helpful starting point for you in what you are hoping to accomplish -- 2 pages, printed back-to-back then folded into thirds, which makes for a compact brochure.
Best wishes with your work!
Paul Pindris