[pair off] {v.}
1. To make a pair of; put two together; associate; match.
* /Mrs. Smith paired off her guests by age and tastes./
2. To belong to a pair; become one of a pair.
* /Jane paired off with Alice in a tennis doubles match./
3. To divide or join into pairs.
* /Later in the day the picnic crowd paired off for walks and boat rides./