We had a member of MSU Motion (dance team) in my chapter, and also a member of the varsity golf team. Both were involved members and able to keep up their commitment to the chapter. They were excused from chapter events which conflicted directly with athletic events (especially since our golfer had an athletic scholarship), but were otherwise expected to comply with the same chapter attendance policies as everyone else.
I had a roommate from another chapter (Kappa Delta) who was also on MSU Motion, but I don't think she was a super involved member. (Not to say that she was a bad member, of course...she just didn't hold offices, etc. But between her dance team obligations
and having an excellent GPA as an engineering major, I'm not sure how she could have fit in holding an office in her chapter.
I suspect though that her great academic record coupled with the cache of having a dance team member still provided great benefit to her chapter, even without holding an office...plus she was a real sweetheart.)