I'm having this issue as well.
It seems like every autonomous action my Sims do favors going and grabbing a drink from somewhere.
Which would probably be more annoying if my Sims weren't Vampires and still had a Bladder need, but it doesn't even stop there, either.
They also love to spend their downtime just mixing drinks at the bar and drinking them, often times going right back to the bar after they finish their previous drink and making another one.
And it gets even worse if the Sim is inspired, since they tend to do stuff that fits that mood, which causes them to make even MORE drinks.
I know Vampires have "Thirst" as a need, but those kinds of drinks don't actually help them!
I mean, my Sims have gotten traits that make many of their needs not decrease (especially coupled with Vampire traits that can do the same), but they could still just do stuff like watch TV or something, rather than running to the sink, fridge, or bar.
On the bright side, all the drinks my Sims make can be sold from the inventory for easy money, even if they're empty glasses.
I have a mod that prevents my Sims from constantly going to the sink, but I can't find one that stops them from grabbing drinks from the fridge. They always seem to want a drink from the fridge.
