Everyone is welcome, and people come for the purpose of making new acquaintances. It follows that, at a mixer one should introduce oneself to other people and not hesitate to ask people of the opposite sex to dance.
欢迎每个人参加,人们参加是为了可以认识些新来的人,因此在这种舞会上,应该向别人自我介绍,请异性跳舞时也不要犹豫。