On my next visit to London I will definitely be giving the Lights of Soho gallery a look.
Lights of Soho says
'Lights of Soho is London’s brightest art gallery and members' lounge, operating as a cultural hub for Soho’s creative community and the global home of creative neon and light art formats. We also provide a daytime meeting space for Soho’s cultural connectors, influencers and creative community.'
35 Brewer St, Soho, London W1F 0RX
Open to the public until 6pm, six days a week.