Starbucks has added its wireless web service to around 110 coffeehouses in Indiana, Kansas, Missouri, New Mexico, and Wisconsin, the company said.
There are now 3,100 Starbucks locations offering high-speed internet access.
"Starbucks customers have clearly embraced Wi-Fi technology as part of their daily routine," said Ken Lombard, president of music and entertainment for Starbucks.
He said the Internet service is keeping customers in stores longer, "primarily during off-peak hours." The average connection lasts about an hour, according to Starbucks.