We were rather impressed by the Hayward's Psycho Buildings exhibition when it opened back in May, and Londoners appear to have shared our enthusiasm: the show has been packed out all summer. It closes on Bank Holiday Monday, meaning this weekend is your last chance to row a jerry-rigged boat across a flooded sculpture garden or see the London skyline from atop a giant inflatable bubble. The gallery is open till 10pm tonight, tickets are......

Whilst everyone seems keen to spend £80 to attend some festival or other at the moment, don't be fooled: there's just as much free-to-cheap fun to be had around the city as ever this week. Here too the theme seems to be big, crowded, and mostly outdoors, but at least if the rain sets in you can bail out none the poorer. Monday: Feeling creative, sociable, and ever so indie? Craft Night is back......

Sitting in a jerry-rigged boat, floating in a flooded sculpture park atop the Hayward as the sun bustles through the clouds and lights up the London Eye, the building's Brutalist architecture almost melts away and resolves itself into a dystopian reverie, one not entirely unpleasant: the capital has been lost, and the temples of culture abandoned to the damp elements. It's a daydream easy to believe in, until the wetsuit-wearing gallery aid comes and......