The Science Museum’s gaming extravaganza ‘Power Up’ was supposed to have closed by now, but the giant pop-up video-game arcade has proven so popular that it’s been extended until June. Big kids have a chance to enjoy a child-free evening of console-based fun at this Wednesday late. There’ll also be a board game-athon, music from the Ready Singer One choir and talks from game designers and industry professionals. It’s dangerous to go alone. Take friends!