Bloomsbury’s Grade II-listed De Morgan House is home to the London Mathematical Society. This year saw the addition of the Cartwright Boardroom and the Rayleigh Room. The former overlooks Russell Square, while both benefit from period features and state-of-the-art AV. Other rooms work well for away days, press conferences, and receptions. The latest AV kit and wi-fi can be found throughout, and food is by green-leaning Eden Caterers. Not-for-profit organisations can get a 20% discount on room hire.