At the cabin, as always, Sheldon is sitting in his traditional spot: on the right seat of a couch that sits in the middle of the room.
Penny says that she got the use of the cabin at Big Bear by promising a lady doctor to go to an Indigo Girls concert with her. Penny had already exploited a woman's attraction to her before, as she explained in The Hook-up Reverberation (2014) that she went to a Melissa Etheridge concert with her PE teacher once, and got an A as a result.
Of all the reasons that Sheldon mentions as to why he doesn't like cabins in woods, he fails to mention being scared by The Cabin in the Woods (2011), like he did in The Focus Attenuation (2014).
During the drinking game, Sheldon surprises everyone when he says he was arrested once. They asked what for and he explained he jaywalked in front of a police officer, then confronted the officer for not doing anything about him jaywalking. Nobody points out that Sheldon was also arrested for contempt in Season 3, Episode 16, The Excelsior Acquisition.