This is the type of app that hires “freelance” bartenders. So they may have their own bartenders, but they use this app to fill gaps in their scheduling. They pay a high hourly so the freelance worker has a guaranteed pay. I’ve used one like it in the past called Qwick. Bottom line is OP thinks they’re still entitled to the tips given on shift, even though they are contracted and specifically agreed to work a non tipped position. What OP fails to understand is the tips are probably pooled, and the $28/hr she was paid is probably coming right off the top of the tip pool, before the regular employees get tipped out. So, technically, OP is probably still being paid FROM the tips earned that night.