Olfactory Kim's game with perfume
The olfactory Kim's game with perfume is a type of Kim's game. It can be used to mingle groups.
Different perfumes, one scent per two (or probably more) players.
All players get one type of perfume from the referees. Typically, two players get the same scent, but the groups could be larger as well. Then, the game starts and the people wander around the room. They have to "smell" each other and try to find the other player(s) that has (or have) the same scent.
Mingling new groups
If a larger bunch of people is to be split randomly in smaller groups, then the referees have to use as many scents as there should be groups.