Same-sex marriage activists are planning to head to Starbucks and other brick and mortar stores in droves on Tuesday.
Equally Wed, an online lesbian and gay wedding magazine, dreamed up the idea to support businesses that are for marriage equality.
The magazine decided August 7 will be National Marriage Equality Day.
More than 32,000 people signed up on the magazine's Facebook page to participate.
Starbucks is one of dozens of companies listed on Equally Wed's website as supporters of LGBT rights.
Others include Delta, Macy's, Southwest Airlines and Target.