I prefer bumping, but then I don't like cocktail parties in the first place
. They feel like a chore. Bumping might not be as sophisticated, but it's an easy system for the actives to remember so there are fewer mistakes. I went to help with recruitment yesterday and didn't notice if they were using the same system we used to use, but generally we had 4 girls to a group plus floaters and the next girl in line would approach the PNM and active, place a hand on their shoulder if necessary, and the first active would introduce the second, excuse themselves, etc. Floaters were a mix of girls that weren't very good at talking to PNMs and girls who were really, really good at it and could rescue a sister if need be. They were told to enter conversations when it seemed appropriate, introduce themselves, talk for a minute or two, then move on.