The bars in the private residences do not get bartenders, at least the one in my active family's house did not. I believe the other ones did. I am playing in a world called hollyweird ( excllent world ) which is a modified save file of bridgeport on the exchange. So I am not sure how the creator set the lots.
The mod description gives some info on the various tweaks availabe. I think you can opt a home bar out of the whole deal so it is a regular juice bar. I dont know if the option exists to have the home bar staffed by a regular bar tender or not.