Fellow comic Fuquan Johnson, 42, was pronounced dead at the scene alongside stand-up Enrico Colangeli, 48, and Quigley's 33-year-old friend Natalie Williamson, while Quigley was expected to pull through.
Bilzerian divides his time between homes in Los Angeles, Las Vegas and San Diego.
The other two victims were later identified as Ricky Angeli and Natalie Williamson.