I believe the lady in the front row wearing the sleeveless, light-colored dress & holding an instrument is Georgia Hale. In her book, Charlie Chaplin: Intimate Close-ups, she recalled being invited by Chaplin to a party that was arranged by Toraichi Kono (far left) in the Japanese section of Los Angeles. According to Georgia, this was her first date with Charlie.
"We went to a most unusual party It had been arranged by Kono, his Japanese valet. He had prepared a most sumptuous feast and show...all Japanese...in the Japanese part of town. Many notables of movieland were invited."Other familiar faces in the photo include King Vidor, second row, second from right, Irving Thalberg (I think), on Charlie's right, and Harry Crocker, whom Georgia remembered being at the party, same row, second from left.