Ttamtam is a Vietnamese restaurant in an alley near Gangnam Station in Seoul. It serves spicy beef small intestine pho at spice levels one through three, and orders of pho come with one free refill of bean sprouts, noodles, or rice. On a Sunday at 3 p.m., entry required no wait, and each table orders through a kiosk with payment made at the counter on the way out. Seating is tightly packed and the two-person tables are narrow.