Hmmm . . . difficult to defend that stance from a Biblical point of view considering that several Old Testament characters are described as DANCING to praise the Lord. Specifically, King David -- who is known as a man after God's own heart -- is described as singing and dancing joyfully on numerous occasions.
Of course, you can also find examples of dancing leading to trouble in the Bible. For example, when Moses came down from the Mt. with the Ten Commandments, he found his people dancing around the golden calf idol -- and for that they were punished by wandering in the wilderness for 40 years.
From a reasonable standpoint, certainly much of the dancing that's done today -- specifically, I'm thinking of the teenagers who are into the "grinding" dancing -- is highly inappropriate. Parents may find it easier to just FORBID ALL DANCING rather than monitor good vs. bad dancing; however, that doesn't help the kids much in the long run. In fact, it can lead to serious confusion when they realize that the Bible doesn't forbid dancing. Kids who realize the difference between what their parents say and what the Bible says may then start to question other things, and that can certainly lead to things the parents didn't want to bring up at all.
Drinking is a similar topic. Nowhere does the Bible forbid drinking; in fact, Jesus' first miracle was to PROVIDE WINE for a wedding. Now, the Bible DOES forbid drunkenness, but many people find it more convenient just to say, "It's wrong to drink" rather than to look at what's really in the text.