Whenever we meet for coffee she has her 2yo with her and proceeds to whip out snacks and drinks (for the child) brought from home. These aren't even subtle... think large pastries, sandwiches, yoghurts etc 
I'm cringing in the coffee shop hoping the staff don't notice. This week they clearly did (although they didn't say anything). She doesn't have special dietary needs so could eat food from the cafe. My friend isn't struggling for money (she's relatively well off). I'm really embarrassed!! Am I BU to think you don't take your own picnic to a coffee shop?? She does buy herself a drink though.