"Charlotte Nights" is a unreleased song written by Lady Gaga during The Monster Ball Tour.
Background
When Gaga was in Charlotte, North Carolina on September 18, 2010 during The Monster Ball Tour, she talked about having written a new song and referenced it as "Charlotte Nights". Before she played "Yoü and I". At the show, she said "I did write another song today while I was here in North Carolina," which she called "An impressive and interesting place" because of an "adult shop" she visited where "the pornography was staggering... Congratulations on your tripple-X stores!" She later said she got really inspired to write a "hit song".
"Brooklyn Nights"
It is unknown if "Charlotte Nights" became "Brooklyn Nights", a song intended to be included on her fourth studio album ARTPOP as there is no reference to "adult shop" in the lyrics.