Each year the punk rock UPenn "fraternity", Pi Lam, host the annual Human BBQ. It's an all day rager, of sorts, featuring BBQ(vegan and non-vegan) and a ton of awesome local and non-local bands.
18 bands are scheduled to perform including Delicate Steve, Norwegian Arms, DRGN King, Cold Fronts, Laser Background, and many more.
On Saturday, April 6th, for $15 you can enjoy the 12-hour-long rager. That price includes all the delicious BBQ and party-laced music you could want–or at least while supplies last. The frat house(a term that should be used loosely, here) is located at 3914 Spruce Street near UPenn's campus.
More information about the day and a complete lineup of the bands can be found on their Facebook page.