TBWA has introduced a restructuring of its West Coast offices-which include TBWA/Chiat/Day/L.A., TBWA/Chiat/Day/San Francisco and Tequila-under the TBWA/California banner. The group will be led by Lee Clow and current Chiat/L.A. president Robert LePlae. ... New York design studio Trollback + Co. has expanded to the West Coast with the launch of a Venice Beach studio, manned by executive producer Michael Maples, formerly of Stuart Waks & Co., CD Mattias Segerholt-formerly of L.A.'s Seiniger Advertising-and art director Nathan Iverson, formerly of R/GA, N.Y. ... McCann Erickson/San Francisco has added four new group creative directors to service the Microsoft and Xbox accounts, a move that comes as McCann expands Tag, its youth marketing practice, to the San Francisco office, where it will be headed up by office GM Courtney Buechert. The hires include the team of Scott Duchon and Geoff Edwards, formerly of TBWA/Chiat/Day/San Francisco, Gerald Lewis-formerly of Ogilvy & Mather/N.Y.-and Chris Toland, formerly of Fallon's L.A. outpost. Mike Harris, formerly of TBWA/Chiat/Day, also comes on board as strategy director for Xbox. ... Q Department, the New York-based music house founded by composer/producer Drazen Bosnjak, has announced the launch of Q Department/Amsterdam, which will be headed up by executive producer Sean Allison, formerly of Leo Burnett.