On the Beach at Night Alone, a South Korean movie about an actress who has an affair with a married film director, makes its Cleveland premiere tonight at 8:45 at the Cleveland Institute of Art Cinematheque. South Korean director Hon Sang-soo drew from personal experience for the film that the New Yorker magazine proclaims has a "fierce intensity." It also screens at 7:30 tomorrow night. Tickets are $10, or $7 for Cinematheque members and students. (Niesel)