Choose a multi-site EPOS on its connections, speed and reporting, not its feature list. Here's the checklist I use with operators.
If tonight's bookings reach the till by way of a printer and a biro, this one is about your venue.
Tip prompts, service charge, minimum spends, reorder points. They went in during installation week and nobody has looked at them since.
Four systems, bought at different times for different reasons, and someone re-keying between them every morning. Sound familiar?
Ask an operator how long the VAT return takes and you learn more about their systems than any audit would tell you.
A busy bar earns its money in a handful of hours a week. Every second your till adds to a sale comes straight out of them.