A trip up the squiggly/is it a rollercoaster in disguise tower also known as The Orbit will set you back £15. So for an extra £2.50 on top of that why not visit the building for the launch party of a new radio station?
The music will be varied: the Orbit's site promises: "soul to disco to hip hop, jungle, grime and even the odd classical track."
You can buy tickets directly on the Orbit's website here: http://arcelormittalorbit.com/orbit-lates/#.U-fQ8GOTGKI
Tickets cost £17.50 ( for those like me who are bad at maths :) ). We could meet beforehand for a drink in the Stratford area, but I will post closer to the time to confirm that part.