It's all about the (lack of) service.
A friend and I walked in yesterday and sat at the counter. The woman behind the counter (middle aged, seemed like she could be the owner or manager) completely ignored us. She was preparing other orders in front of us, and serving people at the cash. She didn't say "I'll just be a moment", or "I'll be with you shortly", or "please order at the cash", she just ignored us as we waited and chatted. People entering after us were being served at the cash. We left after it became clear that we weren't going to be acknowledged.