- Voices Now fills the Roundhouse all weekend with a festival of ensemble singing featuring the Holst Singers, the Magnets, Roundhouse Choirs and London Symphony Chorus plus opportunities for the audience to get involved and sing on BBC Radio 3.
- Wellcome Collection's filthy new exhibition is open and free to all.
- Ether has started at Southbank Centre. The "annual music festival of innovation, art, technology and cross-arts experimentation" runs until 28 April.
- The Human Rights Watch film festival runs at the ICA, Picturehouse and Curzon Cinemas until Wednesday.
- Go elm spotting.
- South London Art Map Last Friday means art, till 8pm, free across South London.
- It's the final of the Canary Wharf Squash Classic in the East Wintergarden from 6.15pm
- Brazilian clown-theatre wows at Stratford Circus tonight as LUME present La Scarpetta
with magic, singing, egg juggling and more. 8pm, tickets £14/10.
- March For The Alternative dominates Saturday as people take to the streets to protest against government cuts. NB. If you're near Trafalgar Square watch out for gorillas trying to give you hugs. You have been warned.
- Bloggers for Japan is sale of stuff raising money for the Tsunami Relief Appeal at the Horatia Pub, Holloway Road N7 between 1-5pm.
- Get Thames-side to cheer on Oxford or Cambridge in the Boat Race. The starting pistol fires at 5 but you'll need to grab a good spot in one of these pubs much earlier than that. There are also giant screens and family fun in Bishops Park SW6 and Furnival Gardens W6.
- A Stoat Race adds to the competing attraction of the Goat Race at Spitalfields City Farm this year. The fun starts at 1pm with the goat head to head at 5pm. £4 in advance.
- The Fashion Designers and Craft Maker's Network puts on a fashion show at Novotel St Pancras to showcase the Crème of Young Fresh and New Fashion Talent competing for the Young Designer Award. Tickets £16 on the door, 4-9pm.
- Graduating live-artists from Goldsmiths invite you to the derelict Asylum Chapel, Peckham SE15 anytime between 11am-4pm for Between Spaces: site-specific installations and performances. One-off, unique and free find the action at Caroline Gardens Chapel, Asylum Road SE15 2SQ.
- There's a Vintage Furniture Flea at York Hall, Bethnal Green between 11am-4.30pm.
- Super Rugby hits Twickenham with the Crusaders vs Sharks match transplanted from Christchurch New Zealand to the home of English Rugby. Tickets £30-50 with a fiver from each going to the Earthquake Relief fund. KO 4pm.
- Sundays go with a swing in Richmond at the Tea Box from 6.30pm with live jazz and latin plus full menu available. Tickets £5 adv or £6 on the door.
- Van der Graaf Generator make a rare Prog-Rock appearance with a performance at Barbican, 8pm. Tickets £15-25.
Other good stuff:
- Need some zing? Look at all this cabaret.
- Rock out with Music Choice
- Like literature? Consult the Book Grocer
- Culture fix required? Absorb Arts Ahead
- Skint? You need London on the Cheap
Image by captainmcdan via the Londonist Flickrpool
The Weekend Post is brought to you by Walk London, championing seven amazing walking routes around London. For ideas and inspiration on exploring the capital on foot, visit the Walk London website or visit them on Facebook.