They also use MySpace and YouTube to offer gently cheeky commentary about service and fares.
They help mothers with baby strollers and encourage riders to be courteous.
Their origins are, well, a little mysterious.
The Daily News says the Metropolitan Transportation Authority wants the "stewardesses" to stop using its logo.
MTA spokesman Kevin Ortiz quipped Thursday that the women should go to Albany to get lawmakers to support the transit system. The MTA approved fare increases and service cuts on Wednesday.
NEW YORK AND TRI-STATE AREA NEWS