My sisters and I used to go to an unnamed fraternity's weekly party. One of the brothers said that we were his fraternity's groupies. We found another way and place to spend our time. After a few weeks, he asked me why we didn't go to their parties anymore. Because we didn't want to be accused of being your groupies.
There were some girls who really were fraternity groupies and provided the brothers with 'comfort', treating them as if they were rock stars. I never understood that.