It does not appear as though Oklahoma State has Spring Recruitment. Opportunities to pledge are during Fall Formal Recruitment and through informal Continuous Open Recruitment (COR):
http://union.okstate.edu/panhellenic/Recruitment.htm
Here is info on COR. This was as of October 25, but it said Phi Mu, AOII and ADII have openings. Again, this is over a month old, but follow their instructions for signing up for COR.
http://union.okstate.edu/panhellenic/COR.htm
Best of luck to you!
