Ice is nothing more than water that won't let people swim in it. Such stubbornness deserves comeuppance in the form of sharp metallic blades that merrily crisscross to and fro across the frozen surface. Incise fancifully with today’s Groupon: for $7, you get two admission passes to open-ice sessions at Penn Ice Rink (up to a $14 value), located on Walnut Street in the Left Bank.

In existence for 40 years, Penn Ice Rink blankets 18,000 square feet with frozen water-diamonds primed for glide-mining. Open-ice sessions are held every day except Tuesday and Thursday, giving frosty foot-bladers numerous opportunities to join a hot date or a lukewarm family member for an afternoon or evening of triple axels and skating gingerly while gripping the wall. Peek at the schedule for public-skating times.

Reviews

Seven Yelpers give Penn Ice Rink an average of 3.5 stars:

• We finally got to the front, rented our skates and got out on the ice. It was tremendous! it really is just wholesome, A OK fun! – lydsey f.