Lazlo Broslav, played by Wolfe Barzell, is naming off his children to Oliver, i.e. Eddie Albert, and mentions one of them as named Magda, which is the first name of Magda Gabor, who is the real-life older sister of Eva Gabor and Zsa Zsa Gabor.
When Lisa makes a chicken sandwich for Lazlo, it's clearly a rubber chicken she's using--the kind found in a gag store.
Adjusted for inflation, the $100 Lazlo ask for would equal approximately $882 in the year 2023. The $30 Oliver pays him would equal about $264.
When Oliver disputes the origin of Kosciuszko Day, he correctly identifies Thaddeus Kosciuszko (1746-1817) as the Polish general who assisted the colonists in American during the Revolutionary War.
Lazlo saved Lisa's uncle during WWII by hiding him in a barrel of wine in his basement. The uncle eventually drank his way out.