Taking a closer look at Vegas's secret room and his decorating tastes.
First off, the password to get inside is '696969', because of course it is:
The creaky secret wall panel door is very Scooby Doo.
Then we have the table:
There's a lot to explore in the tangle of religion, punishment, sex, and the macabre here. Vegas being into knifeplay should come as a surprise to absolutely no one. "The Descent of Man" may be on the nose, but that's consistent for Khun Vegas "Childhood's End" Theerapanyakul. The Halloween-store plastic skull is...a choice. There's gotta be a story there, right? It looks like a kids' toy. He has a much more realistic fake skull sitting on his desk.
(EDIT: two important additions to Vegas's kink collection! @saurons-fat-rack pointed out that the plastic skull is probably a skull candle, which is just as much a choice as a plastic skull tbh, and @redcole noticed a hogtie clip at the base of the Santa Muerte figurine.)
Here's a wider shot of the room:
Vegas has a distinct preference for muted tones and old-fashioned furniture. Why the floor globe? Who knows. The monster portrait has been discussed here. Along with the monster looming over the desk, the net chandelier contributes to the feeling of Vegas being trapped even in his private spaces. Stained glass fits into the religious motif. Please take a moment to imagine Vegas standing on a ladder, carefully putting up his basic-ass red/green/yellow/blue stained glass window decals.
Next, the BDSM rack in the corner:
Not much to add here except that the mirror from 4 is not present during Pete's visit. The Doylist explanation is that the cinematographer didn't want a Pete reflection in this scene. The Watsonian explanation is that Vegas put the mirror there in 4 specifically for his naked demon moment. Really adds to the cool-aesthetic-until-you-think-about-how-much-time-he-spent-lighting-those-candles vibe.
Finally, the desk:
Does Vegas have an unexplored bird thing going on? Two birds on this desk, one on the table, and a bird cage for his hedgehog. Could be part of the freedom/captivity theme, since small birds are explicitly connected to freedom in-show.
(Edit: @redcole says that the desk bird beside the skull is also a candle. Vegas likes having multiple options available for his mood lighting/hedonistic rituals/waxplay...)
Given that Pete's home aesthetic begins and ends with tacking up gun and target posters all over the walls, I think Vegas is going to wind up with much more say in decorating whatever space they end up sharing. The results are sure to be bizarre.