"Are you going" is used in this context because it is asking about the person's plans for the evening, specifically if they are planning to go out with their friends. It is a way to inquire about their intentions for the night in a casual and conversational manner.
"Are you going" is used in this context because it is asking about the person's plans for the evening, specifically if they are planning to go out with their friends. It is a way to inquire about their intentions for the night in a casual and conversational manner.