I’m not very familiar with them either, but I think you can use it as a sort of escrow account. Every time a customer orders a drink, sats are locked in the escrow, when they close the tab, they sign what’s in escrow over to the bar. If they get hammered and forget to close, their sats are stuck in escrow and they can’t claw them back (no idea if this is true but figure it can be possible), they can only sign them forward to the bar.