Some of the institute's members attended the 1994Quidditch World Cup, and were seen gossiping happily in between two tents bearing the institute's name.
Behind the scenes
J. K. Rowling has stated that the Salem Witches' Institute is a play on the Women's Institutes of the United Kingdom. These organisations seek to provide women with educational opportunities and to campaign on issues of importance to women and their communities.
In an interview shortly before the release of Harry Potter and the Goblet of Fire in 2000, J. K. Rowling responded to a question about whether American children could attend Hogwarts School of Witchcraft and Wizardry by stating, "No, they have their own school. You'll find out in Book 4." This lead to speculation among fans that the Salem Witches' Institute was an American wizarding school, which persisted until 2015, when the author revealed on Twitter that it was actually a women's organisation.