Hi, Rich. I can't answer your question about space. But I do have one suggestion about dancers. How about doing a simple Sicilian Circle dance to introduce the concept of  modern contra dance progression? Good luck! Sent from my Verizon LG Smartphone ------ Original message------From: Rich Sbardella via Callers Date: Mon, Aug 1, 2016 9:02 AMTo: Caller's discussion list;Cc: Subject:[Callers] Floor Space Requirement Friends, I have been hire to call a wedding with 145 attendees and 15 known contra dancers.  The bride and groom are insisting on modern contras. I have never thought about floor space, what is the typical requirement for a line of twenty couples? Any very easy duple improper dances to recommend?  I plan on using "Family Contra" and "Jefferson and Lincoln". Thanls,Rich