Welcome to BYC. Glad you decided to join our flock. Your rooster's dance is a very common thing with roosters when they are attempting to exert their dominance. Do keep a close eye on him though. If he becomes aggressive, you will need to get rid of him. Not only do you not want to risk him injuring someone (like putting out an eye), but you don't want to breed aggression into your flock. There are always loads of unwanted roosters available (including some gentle ones) which owners are trying to re-home. Please feel free to ask any other questions you may have. We are here to help in any way we can. Good luck with your rooster.