The opposite of a 'sausage fest'. When a party is all girls and no boys have shown up/been invited. If it's an accidental apricot fest this can be incredibly embarrassing for the host, however if it's intended, there's always a fun night to be had :]
'Whoa Caitlin, why did you invite me to this apricot fest?' or "Wow Caitlin, this apricot fest sure cheered me up after my boyfriend split up with me!'