Blood (1974) 
Andy Milligan's 'Blood' is a weird little film that never takes itself too seriously, and is probably one of the more coherent of Milligan's films I've come across thus far.
The Wolf Man's son and Dracula's Daughter are betrothed in marriage and are looking for somewhere to live on the back of their trip from Europe. Luckily, bowler hatted real estate agents abound throughout Staten Island in 1899 and they are able to rent a house wherein the husband (played by the curt Allan Berendt) can tend to his experiments involving extracting blood from carnivorous plants in order to help satisfy his wife's thirst, all the while aided by a collective of bizarre servants.
Berendt's vampiritic wife is ably played by Hope Stansbury, who throws out shades of 'Monica' from Milligan's 'The Rats are Coming! The Werewolves are Here!' and there are plenty of opportunities for the cast to ham it up in their various roles, to the point where at times you feel as if Milligan is filming an episode of The Munsters, yet still imbibing his trademark essence.