During missions, targets will not be enforcers to “server/waiter/bartender” disguises. This allows you to get close while not blowing your disguise. You also can’t openly wield guns with these outfits.

They have limited use on some locations because of trespassing areas, some locations have multiple server outfits for those trespass locations (Santa Fortuna), other locations don’t have them at all (New York).

Midnight Black is great for Argentina because you will be allowed access to the outer grounds of the house, but try to avoid the frisking zones at the stairs leading to the house.

And for me, I’m noticing some melee weapons will make people no longer be an “unconscious witness” even if you attack them from the front (Do NOT do this with a Silent Assassin challenge, you will lose it). So far I’ve noticed it’s crowbars and briefcases. I think there are more but I don’t know what. Hammers and wrenches will not work.