"No, we don't want people to pay for their tickets.  We want them to give us some of their blood instead." Working for a theatre that produces live art is not without its challenges. With the aim of writing the Universal Declaration of Human Rights in blood into a thick, leather-bound book, The Book of Blood: Human Writes explores issues relating to human rights and (dis)enfranchisement aiming to turn spectators from passive witnesses to more actively contributing participants.

With eighteen different shows happening within a two-week period for Sacred at Chelsea Theatre, space is at a premium in our building at the minute. Fortunately, not all theatre needs an actual theatre building at all. Dr Robert's Magic Bus – a beautiful old Routemaster – will pitch up with a pile of freeloaders, artists, winos, opportunists, surrealists, and chancers on board and be home to three strikingly different performances, including Miss High Leg Kick's Fashion Show down the aisles, and an invitation to become part of your own Hitchcock-style film noir on the top deck. I just hope it's not The Birds, I'm busy enough without scraping pigeon guano out of my hair every five minutes.

In buildings, on buses, in cemeteries and squares, you don't need to sit in tiered rows watching actors take to the stage to be involved in theatre. It happens all around you. Gustavo Ciriaco and Andrea Sonnberger will lead small groups around town, bound together by knicker elastic while Dries Verhoeven is asking us to join him for a one-on-one encounter in a portacabin, a chance meeting with a stranger, that could change our lives. In this small room, one person starts speaking the words the other has always longed to hear, creating a world where a stranger can become a loved one. Can't wait.

With work inspired by getting old and having sex, by cancelling the Olympics, as well as by music and television, the programming of Sacred is designed to push buttons. Yara El-Sherbini is artist-turned-Quizmistress as she hosts her own live quiz show, Universality Challenge, with teams made up of real London University Challenge quiz teams, and playfully explores questions about universal truth. Does it exist? Is happiness a cigar called Hamlet? All this and music too. I'm really looking forward to popstress Marcella Puppini showing us her dark side as she, and an all-girl orchestra, shares songs and stories of love and loss. Imagine Kurt Weil in a corset, drinking Bloody Marys.

All in all it's a pretty packed two weeks. And the blood? Oh, don't worry it's only a drop and it's only one show. It won't hurt. I promise.