[LAblondeGPhi]

My assumption would be that the chapter is encouraged to invite back almost all of their women from round to round (the equivalent of assuming the chapter has an historically poor return rate each day). If it's a campus using RFM, the flex lists should be able to help cushion the numbers if the chapter does better than expected, so they don't have ridiculously large parties.

I'm sure others on here will be able to tell us more precisely.