I'm also one of the founders of Flowtab. When we started the company we made a lot of assumptions about the demand for our product and the ease in which we were going to change bar culture. The demand for the product was there (people used it, they often had a good experience) but it wasn't memorable or valuable enough to make them use it EVERY TIME. That was the hardest thing to do.
Sure we were saving people time, and making the drink ordering experience more efficient (no cash, cards, open tabs and an easily-accessable drink menu), but what we learned is that people in bars are there primarily so socialize, and they don't always need maximum efficiency like you do when you need a ride home (enter Lyft, Uber) or want lunch delivered (Seamless, GrubHub). People in bars like the social friction, and we were offering them a solution that took the social aspect out of the drink ordering process. Hindsight 20/20.
Hopefully other entrepreneurs read our story before dedicating valuable years of their life to a similar product in the space.
Kyle H.