boredom

The school of life

https://www.eventbrite.co.uk/

https://www.meetup.com/

https://www.yelp.com/

https://www.timeout.com/london

https://www.allinlondon.co.uk/whats-on.php

http://www.londontown.com/

http://www.freelondonevents.co.uk/

londonist.com/category/things-to-do/free-and-cheap