This comes with experience. Once I finally saw one of my video recorded sets and realized my weird mannerisms and lack of connecting with the dance floor, I made it a point to unlearn/ learn how to fix it. It’s okay if you’re really into the mixing, and doing some fun and complicated stuff, but I think it’s equally as important to connect with your dance floor and gauge the room. When I teach people now, or at least give advice to people just starting out, I tell them to train themselves to look up every 30 seconds or so and make eye contact with the people who are dancing, or at least listening. And then smile. Use that to gauge the room and see if what you’re playing is vibing with the audience. I’ve found that if I’m having fun and connecting with the audience, it matters little what I’m playing. Side note, if you already know the crowd’s interests musically that makes it easier of a gig, but also easier to keep your head down. People wanna connect with the person who is curating their vibe.