The Senator Theater begins a special two-month film festival pTC Friday with the screening of the 1961 ''West Side Story.'' The musical will remain there through March 21.
Other films scheduled:
"The Sound of Music,'' March 22 to April 4;
''Doctor Zhivago,'' April 5-18;
''Ben-Hur,'' April 19 to May 2;
''Spartacus,'' the restored version starring Kirk Douglas, opening May 3 and running open end.
Tom Kiefaber, owner-manager of the Senator, said the titles were the most requested ''road show'' features. All these films were shown on a reserved-seat basis when they first played Baltimore.