"Beer is not a good cocktail-party drink, especially in a home where you don't know where the bathroom is"

In this quote, Billy Carter is expressing his opinion on the viability of beer as a drink for mixer. He thinks that beer is not an excellent option for such occasions, particularly in a home where the place of the bathroom is unknown. This could be due to the truth that beer is frequently associated with a more casual and relaxed environment, which may not be proper for a formal cocktail party setting. In addition, not understanding where the bathroom is could result in possible embarrassment or hassle for visitors who might require to utilize it. Overall, Carter is suggesting that beer may not be the most suitable or useful choice for a cocktail party.