Winter Adventure Tour: If you’re feeling adventurous and don’t mind the cold, take a winter tour of the Eastern State Penitentiary. Small groups are paired with an expert that will guide you through the eerie cellblocks, center surveillance hub and the newly restored Alfred W. Fleisher Memorial Synagogue. See photographs of inmates’ holiday celebrations along the way. The chilling tour is also available on weekends. Eastern State Penitentiary, 2027 Fairmount Avenue, Philadelphia, Pa. 19130, $8-$12, 3 p.m.
Happy Hour: Stop in Northern Liberties tonight for delicious happy hour specials at P.Y.T. The local burger joint is offering half-price beers and drinks beginning at 5 p.m. Nestled in the Piazza at Schmidts, P.Y.T. offers a lot more than burgers -- try their hot dogs, grilled cheese sandwiches or cobb salad. If you just want a side with your drink, have their hand-cut french fries, chili cheese fries or “possibly the best onion rings you’ve ever had.” Have a drink, grab a burger and a side of fries all under $15 -- that’s a pretty good deal.P.Y.T., 1001 North 2nd Street, Philadelphia, Pa. 19123, Free, 5 p.m.
Open Mic Night: If you think you’re funny, head to Helium tonight for their Open Mic Extravaganza. See if you got what it takes to make a crowd crack-up. Test your new jokes, old jokes and learn a few tips. Mixing pros with amateurs, everyone benefits from this hilarious show whether you’re in the audience or on stage. Helium Comedy Club, 2031 Sansom Street, Philadelphia, Pa. 19103, +21, Free, 8 p.m.