Julie O'Connor is chairwoman of "Masquerade," the major fund-raiser sponsored by the Women's Board of Millard Fillmore Suburban Hospital, to be held Oct. 15 in Buffalo Niagara Marriott. Starting at 11 a.m., there will be a theme basket auction, luncheon and revue of fashions from Stein Mart. Costumes will be provided by George & Co. Linda Pellegrino of Channel 7 WKBW-TV will be master of ceremonies. Jenn Stafford, soprano, will sing and Ken Elminowski of Executive Sound will be disc jockey. Sally Moehlau is co-chairwoman. Proceeds will benefit the renovation and expansion of the hospital. Reservations are being taken at 631-3386. Tickets are $35 each.