Great thoughts and exactly the problem we are trying to solve.
We actually have our system setup to work with Bevinco, which comes in and takes your inventory in the middle of the night and then generates an inventory report. We have a quick order page that matches that so they can just run down a list (opposed to driving through a catalog, which is our main way).
Our plan is to eventually have inventory be apart of our system so we can have machine learning on par levels, consumption, ordering.
With that said, it would be cool if you could integrate with liquor management systems (i.e. BevSpot or BarMetrix) to somehow automate the entire process. So when they ran their inventory it would automatically create events and reorder the required products.