For a while in Ken Urban’s play A Guide for the Homesick, the author’s subject seems predictable. Set in Amsterdam, near Schiphol airport, the two-hander opens with a tall, strapping black man named Teddy (McKinley Belcher III) inviting a younger, white backpacker into his room. They’ve just met at a hotel bar, where the backpacker, Jeremy (Uly Schlesinger), has missed his flight. Teddy offers his guest a beer and a floor to sleep on, but the situation vibrates with sexual tension.