Károlyi restaurant is next to Pesti Lampas, and not far from Kalvin Square and Ferenciek Tere (where you can find Karpatia). In the restaurant they serve delicious food at okay prices, and if you feel hungry, this is a nice place to drop by. It is normally not full of tourists.
Károlyi Étterem és Kávéház
Address: 1053 Budapest, Károlyi Mihály utca 16
Metro stop: Ferenciek Tere (blue metro)