I've followed that system for a long time where I don't turn down any invitation by a woman to dance. Then I started getting held for multiple dances in a row (or get asked every other dance) by the same women. It's probably selfish of me for only wanting to dance multiple dances with women that I like, but these women had a tendency to be overly enthusiastic and unbalanced in their movements, causing my arm to become quite sore. Now I limit the invites by the same person to wait several dances. So they spread themselves around more to other leaders.