Hi and welcome!

To indicate that something is no longer open, it's better to use lifecycle prefix
https://wiki.openstreetmap.org/wiki/Lifecycle_prefix
for example like so
was:amenity=stripclub

Note that OSM is not a historical database, these prefixes are useful when you need indicate to other mappers that something indeed got closed while there is still a sign for that place or a building was removed, but it's still on aerial imagery so that no one would retrace it again.

As the strip club website is still up and nothing is mentioned about it closing, it would be correct to use lifecycle prefix. I assume you've verified it somehow.