We remarked with pain that the indecent foreign dance called the Waltz was introduced (we believe for the first time) at the English court on Friday last … it is quite sufficient to cast one’s eyes on the voluptuous intertwining of the limbs and close compressure on the bodies in their dance, to see that it is indeed far removed from the modest reserve which has hitherto been considered distinctive of English females. So long as this obscene display was confined to prostitutes and adulteresses, we did not think it deserving of notice; but now that it is attempted to be forced on the respectable classes of society by the civil examples of their superiors, we feel it a duty to warn every parent against exposing his daughter to so fatal a contagion.” ( The Times, 16th July 1816)

The waltz,was thought to be rather scandalous in Jane Austen’s section of society, and it was still regarded as shocking as late as 1825. The capital waltzes Mrs Weston plays in Emma are country dances, most probably based on the Landler dance. Does that help?