The Mirzakhani Society is a society for women studying maths at Oxford, named after Maryam Mirzakhani (the first woman to win a Fields Medal). Its aim is to support students through providing a space to discuss issues that women may encounter during their degrees. It holds weekly ‘Sip and Solve’ meetings with tea and cake, and other events such as socials and talks. It is open to both undergraduates and postgraduates, and has a wide mix of people at its events. You can find out more about the society on their website.