its a bug she's only there a specific day of the week I think friday
try following the walk through
https://docs.google.com/document/d/1LkXWll0_8kVL23hHWWySoRwKL_4dyluPHeLQsnhvwuE/...
all I can say is on a previous patch I had the same bug but after checking the club every day she appeared on the day she's supposed to I think it should be marked on your calendar