I find this disappointing too. I tend to order tea or coffee, and while those I'm with will have cake or whatever I'll make discreet inroads into my portable low carb snack supply. I figure that as I'm already a customer drinking their tea it's kind of acceptable, but I'm very discreet.
It'd be so cool actually to have access to hardboiled eggs in their shells from supermarkets and shops and cafes etc - that blew me away when I was working in Germany - it was brilliant! Someone appeared on 'Dragons' Den' with that idea relatively recently but the Dragons didn't like the food colourings in the gelatine coating. Shame. I know you can buy a pot with a shelled egg and spinach and what-not from supermarkets and Pret and M&S, but ones in their shells are in my opinion more practical.