It's my understanding Catholic's avoid 'heavy metal' in Church; light metal as well.
But, I think you have the wrong understanding of 'feast' when used in this context. From memory, Christmas came from the early Catholic celebration. Those celebrations are called Ecclesiastical Feasts. It declared a Holy Day to celebrate the Eucharist, celebrating our spiritual faith and the history of our redemption, the memory of the Virgin Mother of Christ, or of His apostles, martyrs, and saints, in a special Mass. Now that's not to say that certain delicacies weren't enjoyed afterwards. So in antiquity, when you read about feasts or celebrations, the normal context is going to Church to worship. On Christmas we celebrate the Eucharist and celebrate in prayer (a 'feast') of Christ's birth; more often than not at midnight. If you're interested follow the link, it follows the celebration as far back as Irenaeus (a 1st century catechist, i.e. teacher)
CATHOLIC ENCYCLOPEDIA: Christmas
No, we don't want to be 'just like' people in Christ's day. That's not the point. The point is a sacred worship of God.