In life, sure looks matter. It gets you in clubs faster, more dates, people opening doors for you if you're female,...you all know. But, it does not get you very far and it's ephemeral. Sure it might get you more dates, but if there's no connection or if he's interested only in your looks, your relationship is going nowhere. Sure it might land you a job interview, but unless it's a job at a strip club, you'd probably not get the job if you don't have skills...Even good looking people have problems. There'll always be someone else prettier and younger. Lucky for us guys, we get more distinqushed as we age. Society is so screwed up.
To answer your question, I do notice a girl's look, but it doesn't stop me from asking her to dance regardless. However, what will determine whether if I'll ask her to dance again is how well she dances with me, whether or not she enjoys dancing with me, and her hygien.