Which preposition to use with waltzer

at Occurrences 2%

What a figure he cuts there, sitting in solitary state upon his glass tripod,in the middle of a crowd of excited fellow-beings, hurried to and fro by their passions and sympathies,like an awkward country-bumpkin caught in the midst of a gay crowd of polkers and waltzers at a ball,or an oyster bedded on a rock, with silver fishes playing rapid games of hide and seek, love and hate, in the clear briny depths above and beneath!

in Occurrences 1%

Sheldon had actually the insolence to tell his sister Leta that I was the best waltzer in society.

Which preposition to use with  waltzer