Possible Clues:

• Laverne and Shirley, e.g
• Thelma and Louise, e.g
• Baby shower attendees, often
• Bachelorette party attendees
• Ladies who lunch, maybe
• Euphemism for a lesbian couple
• Female buds
• 'Sex and the City' quartet, e.g
• Chicks to hang with
• Group in 'Sex and the City,' e.g.