Millenium Biltmore Hotel, Los Angeles.
sauce: https://www.oyster.com/los-angeles/hotels/millennium-biltmore-hotel-los-angeles/photos/pool-millennium-biltmore-hotel-los-angeles-v665692/
Blood-stained hands possible indication that they're forced to participate in the sacrificing of others to drive adrenochrome levels up before they themselves are sacrificied?