This makes no sense to me:

Decaffeinated coffee is quietly slipping out of the post-morning brewing rotation at Starbucks Corp.

The Seattle coffee giant has instructed its U.S. baristas to stop regularly brewing batches of decaffeinated coffee after noon, according to a memo reviewed by The Wall Street Journal and confirmed by the company….

“For many of our stores, the demand for decaf is greatly reduced in the afternoon and therefore yields high waste with the current standard,” the memo says.

I’ll have to take their word for it that demand for decaf falls off in the afternoon, but I’m at a loss to understand it. People order more decaf in the morning than in the afternoon? Why?