The Seatuck Environmental Association’s seventh annual Bats & Brews craft beer festival at the Scully Estate mansion in Islip was sold out for Saturday night.

If you check out these photos, it’s easy to understand why.

Aside from beer from 20 Long Island brewers, revelers got a bit of an education about local wildlife, such as bats, and sustainability concerns in farming and the push to grow and consume local products.

Bats & Brews started as a lecture series and has grown into one of Seatuck’s primary annual fundraisers. Related: On trying to protect bats, our secret nighttime flyers

Click to the 2 and 3 boxes to scroll through all 15 photos below.