There are two Russian men playing chess. After frightening Lisa away ("My pleasure! It's six blocks that way!"), one checkmates the other, to which the response is upending the chessboard accompanied by the subtitle "Good game! How about another?".

The joke isn't really Lisa mistaking a "gruff Slavic manner" for hostility, it's more the Slavic manner being actually hostile.

https://www.youtube.com/watch?v=HyVMiE7jAJo