I have been to Six Penn Kitchen 4 times in the last 3 months and every time I have enjoyed excellent service and very high quality food presented beautifully. I am sensitive to food additives and appreciate that Six Penn Kitchen has a real commitment to making fresh, seasonal food from scratch. Their menu changes every couple of weeks so you'll have to be willing to try something new! My favorites so far have been the cheesecake with bananas foster, chocolate pistachio pate, Fried calamari and rock shrimp appetizer, and the empanadas appetizer. They also had a wicked peach schnapps and fresh squeezed pomegranate juice martini on the menu a few weeks ago.
My favorite waiter is Phil and I recommend reservations if you plan on dining during pre-theater and symphony hours.