I have voted for the "slotted" method but it depends on the numbers to be moved. Before I explain further the venues I teach at are used to both methods I am going to describe.
If I have up to 8 spare people (usually ladies but I have had 12 spare men before now!
), I use the train method, 8 ladies on. More than that I use the split method, however, I only use it on the outside rows and don't place spare people on the inner rows as it can put them in harms way when performing the moves.
Overall I would say one system can go as wrong as any other and the problem is it only takes one complete muppet to kybosh the whole lot!
