A practice commonly used at the
California Institute of Technology (Caltech) by men desiring female companionship. Due to the lopsided demographics (75% men, 25% women),
one finds a dearth of women at Caltech. Thus, several men tend to court a woman at once. So, glomming refers to the practice of several men hooking onto (not literally) to
one woman.
At a dance,
one can find several men dancing with
one woman. They are glomming her. Or,
one might find several men walking to class with one woman. These men are glomming.