Although not a huge fan of their "early night" dancing - i.e. 10-2AM, their early morning clubbing suits me quite fine.
Getting in "earlier" (10P-2AM) feels like you're trapped in a sardine can ...and as fun as that sounds, I don't love being squished by millions of people in almost impossible to move space.
When you get to 3-4AM, the crowd lessens but the music is even better with 80's, 90's, techno and top 40 mixes. They even shower the crowd with confetti.
If it gets too loud, sneak out pass the DJ and onto the balcony for a great view of the canals.
Cover charge ($20 for gals) enforced after 10PM.
Bathrooms for women are upstairs -- and have transparent doors until you lock 'em. Only seen this at one other place in Philly.