at 600-700 people, the venue was not near it's capacity.

[Wiz Imp]

In other words, calling it "packed" was a lie (surprise, surprise!)

https://pennsnortheast.com/news/article/mount-airy-casino-resort-unveils-40m-luxurious-expansion-in-the-poconos#:~:text=The%2016%2C000%20square%2Dfoot%20meeting,for%20putting%20on%20a%20show.

The 16,000 square-foot meeting and event space can be divided into six rooms and for just about any event- such as a wedding or concert. The entire space can accommodate 750 seated guests or 1,200 attendees for events, allowing for organizations such as the Sherman Theater, who hosts its Summer Stage at Mount Airy, an indoor option for putting on a show.