This is maybe the smallest airport lounge I've ever visited, and while PIT is a pretty low volume airport, they're not lacking for available space. My weekday afternoon visit was crowded, nearly every seating area occupied.
What gets this up to 4 stars is the very friendly and attentive service, as well as the solidly above average food ... featuring pierogies! This, along with a Yuengling offered, made me feel welcome back home.
Otherwise, drink choices were typical. Wi-Fi was very fast.