If you like spicy food you'll definitely enjoy most Korean dishes from kimchi and bibimpap (the most basic but nonetheless delicious dishes) to soondooboo jiggae (tofu spicy hot stew) or kimchi jiggae (popular meat spicy hot stew), there tons of small and cheap food stalls or restaurants in Seoul where you can eat delicious food in a popular atmosphere. Be careful though: Korean like about anything when it comes to meat even things that a foreigner's stomach would have some trouble with...