[unixfox]

They all died after having a drink from the mini bar. Bootleg liquor would be a good bet.

Or someone intentionally put those there to poison the guests.

[Kirkwood]

If it was bootleg liquor you would expect to find survivors who ended up with liver failure or blindness.

[Ozark Tom]

At least one person had taken immediately ill after a sip of a ‘flat pop’ from the minibar stash. Bleeding from the mouth possibly implicates a caustic.