I agree, a movie that only appeals to one quadrant (adult women) is not going to make a big splash at the box office.
Plus a lot of women didn't like the first movie because they thought the movie was about stripping.
Channing Tatum has always said about both movies, " this is a movie about STRIPPERS" he never said it was about STRIPPING.
Some people were disappointed because it wasn't a lot of stripping.
Both movies are character driven movie, about the ups and downs of the strippers.