Truly American 'style' food with interesting (and tasty) combinations. The burgers are good though the toasted buns do not hold up to the challenge of keeping everything together until the end of the meal. The night we were there they had live music and it would be good to have reservations on such nights. The waiters were very helpful to non-Portuguese speaking patrons with menus with pictures you could point to. The American style shakes were more than a little runny but given you only had paper straws (no spoons) in which in indulge it kind of made sense. Always interesting to see how another culture interprets your own. If I are hungry for an Americana 1960/70's style burger cafe you will enjoy Zack's. Definitely worth a go. read more