My browser history now includes several Amazon listings for stripper poles.

I have learned that:

1. The listing ALWAYS calls them “dancing poles” but Amazon knows what you mean,

2. About half of them are sold as “unisex” even though all of the photos of them in use show women,

3. Only some require drilling into the ceiling. The few that do ship with screws or lag bolts that are approx. 2 inches in length and come with drywall anchors.

So, if installing any of the poles from Amazon’s first page of results, your floor would have to be approximately 1.5 inches thick.

If the downstairs apartment had no ceiling treatment and you looked up at joists and subfloor, you might get here if she decided to attach between the ceiling joists. In a typical residential structure with a drywall ceiling, you’d need lag bolts some 10 or 12 inches long to reach through the plate of the pole, 3/4" of drywall, 8 or 10 inches of floor system depending, 3/4" of subfloor and 1/2" of flooring.