When you enter into a Korean restaurant, you either choose a place where you would like to sit, or you are asked to be seated somewhere. Then a waiter/waitress (restaurant server) would bring you a menu, showing a list of food and drinks. Few minutes later, the restaurant server comes back and ask you what you would like to order. In case that you have made a decision before the restaurant server returns, you can catch his/her attention by saying: 저기요! , literally meaning "over there!" When the restaurant server arrives in front of you, you point to any food or drinks that you desire, and tell him/her the following: 이거(i-geo), 하나(ha-na)/한개(han-gae), which means "this one, one set(piece)" if you want more than one set, the corresponding numerals are: two (sets) = 두개(du-gae) ; three (sets) = 세개(se-gae) ; four (sets) = 네개(ne-gae) ; five (sets) = 다섯개(ta-seot-gae) ; six (sets) = 여섯개(yeo-seot-gae) ; seven (sets) = 일곱개(il-gop-gae) ; eight (sets) = 여덟개(yeo-deol-gae) ; nine (sets) = 아홉개(a-hop-gae) and ten (sets) = 열개(yeol-gae). If it is a cup (or a bottle) of drink that you want to order, you point to the drink on the menu and tell the server: 이거(i-geo), ～잔(jan) /～병(byeong), which means "this one, ~ cups(s) / bottle(s)". ～ is substituted by the respective numerals (by dropping the word 개[gae]) as shown before. When you finish the order, you may say to the server: 주세요 , which means "please (give me the above food/drinks)" or "please (take the above as order)". The restaurant server would understand it, take back the menu and place the order to the kitchen. I think that the above is the easiest way for a foreigner to place an order at a Korean restaurant, without a necessity to know so many vocabularies.