It's all about the laidback atmosphere with Pop Up, whose £10 tickets are the cheapest of the bunch. Expect to see groups of mates reliving their slacker years – but instead of heckling the telly, they're yelling at a giant inflatable screen. Touring all corners of London, this year's Pop Up venues include Coram's Fields in Holborn, Manor House Gardens in Lewisham and Wormholt Park, Hammersmith. Films are shout-at-the-screen favourites. Tickets on-sale from mid May.