Though best known for expanding the limits of human thought, the great philosophers were also ardent proponents of skin treatments—rarely furrowing their brows without first applying a de-furrowing cucumber mask. Wipe out your own philosophical furrows with today's Groupon at Pink Lime Salon & Spa, located on 108 Street. Choose from the following options:

• For $50, you get $100 worth of services.
• For $25, you get $50 worth of services.

Pink Lime Salon & Spa's skilled aestheticians invite patrons into their fun, vibrant space for a variety of pampering services. An express 15-minute botanical beauty encounter facial ($60) fusses over the face with a cleansing mask and great-aunt cheek pinches, and talons and toes transform into elegant extremities with a standard manicure ($45 for men, $52 for women) or pedicure ($62 for men, $78 for women). For clients seeking more dramatic appearance-alterations, a haircut and style ($65+ for women, $30+ for men) or perm ($100+) administered by the salon's strand-snippers can freshen fried 'dos for surveillance camera close-ups. Pink Lime Salon & Spa is open six days a week.