What is another name for a rollerskating waitress?

Although they don't necessarily need to be on skates, the term you're searching for is "carhop." Fast food joints made the skating carhop famous, and they're making a comeback, according to USA Today. Sonic and Ruby's are probably the two best known restaurants to offer skating carhops.

Tags: carhopskatescomebackruby 
Monday, February 06 2012
Source: http://www.merriam-webster.com/dictionary/carhop