Maybe, since it is a cafe, you can put coffee cup emojis on the tables, and maybe the muffin tray prop to give it vibe. In addition to that, you can make like a jar 
but make it a tip jar for tips on the counter. You can make a cash register to spice things up a bit you know? I agree with what chrysostom and speedy_kd4 said, it would be awesome to put carpets and laptops, chairs and stools! The possibilities are endless. I also agree with leahciM, potted plants would give spice too. 
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