My strategy has been scatter promenades.  Instead of Fwd & Bk, Fwd & Pass
Thru, I call.   "Scatter....Find a new couple and Circle left."  (Dudley
referred to "Siege of Carrick".)  You may loose a phrase or two, but no big
deal.  Works especially well with dances that do not require 1s and 2s to
dance different parts.  Sometimes the Circles and Stars become 16 steps
instead of 8, especially with children involved.
On Wed, Mar 9, 2016 at 11:47 AM, Kalia Kliban kalia.kliban(a)gmail.com
[trad-dance-callers] <trad-dance-callers(a)yahoogroups.com> wrote:
 
 On 3/9/2016 6:48 AM, Tony Parkes tony(a)hands4.com [trad-dance-callers]
 wrote:
  When I was a very young and unseasoned caller, I
fell in love with
 contras and tried to include them in my one-nighters. In order to get a
 majority of people to understand the progression, I had to make the
 walkthrough longer than the dance. It didn’t help that I was using
 dances like Haymakers’ Jig, which has a ladies chain and needs a decent
 swing to avoid falling flat. People were giving up and sitting down
 before the music stopped. After a year or two I gave up on using contras
 with groups of all first-timers.
 At one-nighters these days I always do a Sicilian circle as the second
 dance of the evening, usually the first figure of Ed Durlacher’s Sanita
 Hill Circle: circles, do-si-dos, stars, forward & back and pass through. 
 I've had some difficulties getting ONS dancers into position for
 Sicilian circles, especially if there's alcohol at the event. My usual
 strategy has been to get everyone into a big circle with their partner,
 then scoot quickly around the circle moving the couples so they're face
 to face. There tends to be a fair bit of driftage and wandering,
 though, and often by the time i get round the circle the first folks
 have fallen out of place or other couples have drifted in and need to be
 corralled. Nonetheless, Sicilians seem like a really good way to
 approach progressive longways dances for a ONS group. I'd welcome any
 proven strategies for forming the circle. Perhaps avoiding those winery
 party gigs...:>)
 Kalia in the wine country, CA