Dancerist is one of those colloquial words that emerged amidst the COVID-19 pandemic, simply by adding the suffix "ist" to a word. Dancerist is/are referring to someone who dances.
Any establishment in which music is played and dancing is likely to occur, such as a bar, nightclub, or strip joint.
The word 'Dancerie' is often used in conjunction with hateration or holleration. Each of these three words were introduced by Mary J. Blige in the song Family Affair.
Popular lexicon extends the word's usage to include general locations not necessarilyassociated with dancing, such as your home, work, or favorite hangout.