How to Say "I'm going to drink a cup of coffee at a cafe." in Korean?

"I'm going to drink a cup of coffee at a cafe." in Korean is 카페에서 커피 한 잔 마실 거예요. (kapeeseo keopi han jan masil geoyeyo)

샌드위치 (saendeuwichi) - Sandwich
만들어요. (mandeureoyo) - I make it.
만들 거예요. (mandeul geoyeyo) - I'm going to make it.
샌드위치 만들어요. (saendeuwichi mandeureoyo) - I make a sandwich.
샌드위치 만들 거예요. (saendeuwichi mandeul geoyeyo) - I'm going to make a sandwich.
집에서 샌드위치 만들 거예요. (jibeseo saendeuwichi mandeul geoyeyo) - I'm going to make a sandwich at home.
베이글 샌드위치 (beigeul saendeuwichi) - Bagel Sandwich
베이글 샌드위치 먹을 거예요. (beigeul saendeuwichi meogeul geoyeyo) - I'm going to eat a bagel sandwich.