If you plan to work in the US during an internship or full time, you need to understand American culture. The classroom is a start. But that’s structured learning. You also need unstructured learning. This type of learning happens outside the classroom.
If you want to be hired by an American organization, you need to be comfortable interacting with Americans. Comfortable means more than speaking good English. It also means being able to engage in small talk. It means understanding humor, showing enthusiasm at appropriate times, respecting personal space and boundaries, learning about popular movies, music, tv shows, and other elements of American culture. Hanging out with Americans helps you learn the nuances of American culture. It allows you to interact, observe, learn, and try new things.