Somebody On The Internet Is Wrong

Yes there's the general everything-not-New-York is kabumfuck attitude here, but also just wrongness.

In Philly, there are those huge, big-box restaurants. But you're going to be around 50 seats, right?

Philly barely has anything resembling "big-box" restaurants, whatever that is. If the city is known for anything, restaurant-wise, it's for little tiny BYOBs with under 30 seats. That's both due to our stupid liquor laws (liquor licenses are expensive and hard to get) and the existing architectural stock most places.