OK. The world I am playing has been populated with ALL late night bars. So all I could tell from that was that my home bar worked. My mixologist can create drinks and "discover" new ones from his own house now with just the juice bar from the 50s set.
I then went into a fresh game in Dragon Valley. McsSomebody's pub had a juice bar. I clicked on it and chose the "enable profession bar" item. About 2 sim hours later, a mixologist showed up, but I could only order a spine reticulator
So I went into edit town, and changed the pub from Visitors allowed to a sports bar. Everybody got booted out of the bar. My sim went back in, and in about 2 hours the same bartender sim showed up. This time my sim could order a number of drinks, including the Bad Cheerleader, which geve him the "In the mood " moodlet.
So, that is what I know about the convert all bars mod so far. Hope it helps