considering preferences given in your brief I present you my proposal for THUN CAFFE in 1m by 1m modular raster which can be adapted for any layout. You can see from renders that colors are bright and cheerful. In this layout is possible to sit 32 people of which 20 on high tables, 4 on armchair next to entrance 4 on bar counter and 4 in separe.
I hope that you will like this proposal.
Best regards.