Three vampires walk into a bar.
The waitress comes up to them
and asks them what they'll have. ?
The first vampire says,
(Transylvanian accent inferred)
"I'll have a glass of O Positive."
The second vampire says,
"I'll have a glass of AB Negative."
The third vampire says,
"I'm the designated driver.
I'll just have a glass of plasma."

The waitress turns toward the bartender and yells,
"Gimme two bloods and one blood lite!"