If addressing a group of only men or only women do you use a plural for mesye or madanm?

plural for "mesye" (when adressing a group of "only" men)  is "Mèsye"

plural for "madanm" (when adressing a group of "women")  is "Mèdam"

For a group of men and women together, you'll say "Mèsyedam"

Then you can say:

Mesyedam lasosyete! → Ladies and gentlemen of the public!

Bonjou Mesyedam! → Hello ladies and gentlemen!

Mesyedam, mwen salye nou. → Ladies and gentlemen, I greet you.

Mesyedam, bonswa! → Ladies and gentlemen, good evening!

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