[Callers] Swingless contras?

This week, I called a dance for 50 enthusiastic highschool juniors who were celebrating the end of their semester together. All beginners. The organizer asked that we do contras and so I picked ones that had very obvious transitions and slowly introduced new moves. I wasn't prepared for their enthusiasm! By the fourth dance they settled a bit and better understood the contra format and we all got into a good grove. I found that initially, the kids embraced the swings with gusto. The dances that I picked included both neighbor and partner swings -- and once they got going, there was no stopping them within the 8 measures. So we proceeded off-tempo and everyone had a good time. I'm wondering if anyone knows of any swingless contras. For this type of audience, I might consider adding in one or two such dances near the beginning. Any other tips that you've learned for calling for enthusiastic teens would also be appreciated. Nancy Turner Waitsfield VT