It really depends on the fitness level of the clients and how big the group is. What I do with 2 people can be more sophisticated than what I do with 16 people in 8 pairs because teaching 16 people takes more time than teaching 2 people. It also depends on what equipment I have. Here are a few links to partner exercises that I’ve done with my classes / small group.
If you find these useful, I can send you some more links, or you can check out my channel “Aerobigirl” and see other partner drills. Most of my stuff is public so you should be able to find it.