By Yvonne Villarreal, Los Angeles Times (TNS)
It should come as no surprise that Mad Men, a drama about a 1960s advertising firm, has designed what it hopes to be an unforgettable send-off campaign.
The pioneering AMC series will launch its seventh and final season on April 5 — culminating in a swan song that probably will generate the kind of frenzied chatter last seen by its sister drama Breaking Bad in 2013.
To rally viewers as the end draws near, the network is promoting the final stretch of the drama with a multimillion-dollar marketing campaign. There’s even a black-tie ball at the Dorothy Chandler Pavilion for its premiere.…