In Scotland the joke is told about Calvinists.

Russ said "My (not completely uninformed) guess is that the prohibition of dancing is limited to protestant/reform churches."

Your guess is better informed than most. The prohibition is limited (in the Christian tradition) to protestant reform churches. Catholics don't have a a corresponding tradition, which is why the problem of policing dancing in Catholic areas of Britain and Ireland became such a point of contention. The Catholic priests who attempted to ban dance were doing so in an effort to conform to the sexual and moral standards imposed by their anti-dance Protestant peers and superiors. The Christian anti-dance movement got pretty damn ugly in Ireland in the post-Famine era, and in a culture where dance and music was so highly valued, acted as just one more thing for Irish people to break free of through immigration.

Perhaps the precipitous population declines in rural Ireland in the post-Famine era should be the ultimate morality tale for organized religion. It is proof of what such extreme protestant moralism does to a people.