Several bars, one stocktake
Each bar is an area within the venue. Different people can count different areas at the same time on their own phones, and the results consolidate into a single variance and GP view.
Fast counts either side of a weekend
Run a Friday opening count and a Sunday closing count. Because lines are costed as they are entered, the weekend's variance is ready as soon as the count is approved.
Where late-venue shrinkage shows up
Per-bar, per-product variance separates the bar with a training problem from the bar with a counting problem — a distinction a venue-wide figure hides.