Love this place! I stumbled across it while trying to find a place to work out during an extremely icy and cold winter (even by Pittsburgh standards). The first time that I went, I was startled by how hot it was (yes, I know that it is "hot yoga"). Now though, I realize that this heat helps me stretch and serves as a reminder to hydrate.
For those not familiar with hot yoga, it is approximately 95 degrees in the studio. Therefore, I suggest bringing your own mat, at least two towels (a big one to cover your mat and a small one to wipe off sweat), and water (the studio is plastic free - meaning they don't sell bottled water, but offer a water fountain). Tighter clothing is easier to move in than loose baggy clothes.
Have fun - namaste!