Dana Centre
The Dana Centre in South Kensington is essentially a spin-off of the Science Museum. It hosts an extensive schedule of free talks and discussion sessions, designed to make science more interesting and accessible for adults.
The nearest tube station is Gloucester Road, South Kensington station is also very nearby.
Address: 165 Queen's Gate, London, SW7 5HE
Website: http://www.danacentre.org.uk