The weirdest frugalleering failure happened to me in Costa today.
We nipped into the visit the ladies, and then went to buy a small pot of fruit salad as a sort of excuse for being in there iykwim. This is the conversation that ensued:
Shop assistant: "£3.50 then"
Me: "What!? For fruit salad? I'll just have a flapjack."
Shop assistant: "You can't change your mind now, it's in the blender."
Me (Seeing blender full of pulverised fruit):
"What have you done to my fruit salad!?
Shop assistant: "It's not a fruit salad it's a drink. Didn't you read it?"
Me: "I never read fruit salad before I buy it. I don't have to pay for it now do I? I don't want to pay for fruit salad that's been destroyed."
Shop assistant: "No, haven't you heard? Everything's free in here."
I bought a flapjack and left. The world is very strange.