Tonight: Microperformances on architecture happen at Whitechapel Gallery tonight from 7pm. An artist, a comic, an actor, a musician and an historian find inspiration in the Café/Bar, responding to the current exhibition. Free.
Saturday: Blackheath hosts the free Bike and Kite Festival today and tomorrow, with kite displays, professional and amateur competitions, bike displays and fun activities including BMX racing, art workshops and bike skills sessions between midday and 7pm.
Bermondsey Carnival brings you The Event at The Bandstand, Jamaica Road, SE16 between noon and 6pm, featuring X Factor "stars" Stacey Solomon and Andy Abraham plus Nigel of Bermondsey (the bandstand, 4ish). Free.
Oh, and don't forget the Wall of Death at Carters Steam Fair in Bel Air Park, Dulwich this weekend!
Sunday: Twickenham Carnival Village sets up in the grounds of Orleans House Gallery between 1-5pm. Meet the Carnival Parade at York House, midday. Free.
The Greenacre Bicycle Rally urges you to cycle with them around Finchley to raise awareness of cycling in the area. Register by 11.30am, set off noon on a triangular 3 mile circuit from artsdepot to Friern Barnet up to Whetstone and back down to North Finchley. Followed by a 'green ride' and environmental fair at the Barnet Countryside Centre.
If the weather defeats you Meltdown at the Southbank Centre has an afternoon of free music lined up with the Bandstand Busking Free Stage from 1pm in the Clore Ballroom, Royal Festival Hall.
Monday: Meltdown's curator, Richard Thomson presents a screening of Grizzly Man (which he soundtracked) in the Purcell Room at 7.45pm. It's free but you need a ticket which will cost you £1.45 unless you're a Southbank Member.
Tuesday: How would Adam Smith fix the financial crisis? A very good question to be discussed at the free public Gresham College lecture, Museum of London, 6pm, free.
Wednesday: Play games with Sandpit at the ICA courtesy of Hide & Seek. There'll be running, hiding, japes, making, deducing, hats and more between 6.30-10pm. £4, free to ICA members.
Help your fellow readers stay thrifty - let us know about cheap and free events happening in your hood. Email firstname.lastname@example.org, leave a comment or tweet us @londonist. And please do let us know if you follow up on our cheap suggestions - were they any good? Thanks.