LAS VEGAS

Singer Frank Sinatra says he’ll do it “my way” . . . which means he won’t cross picket lines to open a scheduled engagement at Bally’s on Thursday . In a statement released by Frank Sinatra Jr., who is his father’s musical director, the singer said he feels “obligated not to violate the picket line for the musicians I have worked with since the ‘40s.” Las Vegas musicians have been on strike over the use of taped music in hotel showrooms and guaranteed work weeks.