I noticed this yesterday when I went into a Starbucks to grab my venti mocha with light whip and while it stuck out that there was something different, it didn't really register what the difference was. The DC Starbucks have switched from gender marked bathrooms to gender free facilities.
The move came after the DC Trans Coalition requested that the chain comply with local regulations that require restroom facilities are equally accessible to transgender and gender non-conforming people.
In 2006, the D.C. Human Rights Act was amended to include gender identity as a protected class under the law. Nearly four years ago, the D.C. Council passed regulations ensuring that public accommodations--including public restrooms--were truly equally accessible to trans people. According to the law, District businesses must "allow individuals the right to use gender-specific restrooms and other gender-specific facilities such as dressing rooms, homeless shelters, and group homes that are consistent with their gender identity or expression."