pair off
phrasal verbPart ofpair
pair off — phrasal verb
1. to form couples or small groups of two, usually at a party, dance, or social eve
1.phrasal verb
Definition
to form couples or small groups of two, usually at a party, dance, or social event where people start spending time alone with one chosen partner.
Example
By the end of the evening, most of the guests had paired off and were chatting in corners.