I feel like we refer to the characters as:

Dom (sometimes maybe "christopha")
The Grandpa
Albie
Aubrey Plaza
Aubrey Plaza's husband
The other dude who cheats on his wife
Daphne
The hooker
The hooker's friend
The piano player guy
Jennifer Coolidge
Portia
Old British dude
The Nephew
Hotel manager lady
Greg
Alessio