Stupid Starbucks conversation

I stopped at not-my-Starbucks this morning - I had to run some errands and my normal Starbusks ended up being out of the way.

The conversation went like this:
me: "I'd like a venti shaken black tea lemonade, unsweetened, in my personal cup."
staff: "Ok, that's $3.15"

Then I walked to the pickup area.
barista: "oh, we're out of lemonade. It's a summer drink."
me: "If it's a summer drink, why is it still on your menu?"
barista: "We still SERVE it, we just don't STOCK the supplies."
me: "That is the most ridiculous thing I've ever heard."
barista: "Do you want just a regular iced tea then?"
me: "I guess."

Tomorrow, I'm going back to MY Starbucks. Where they don't make weird excuses.