ADDENDUM: The construction of the clause “at the club she dances at” is grammatically poor. While English teachers drill students not to end sentences with prepositions, really one should take care not to end any clause with a preposition. Just because the “at” doesn’t appear at the end of the sentence doesn’t make it right. But then “at the club at which she dances” isn’t much less clunky. A sharp editor could have suggested “at the club where she dances.”