Make a mental note:

Always carry sufficient blu-tac supplies when you need to put up a crapload of posters. Because it is never fun to be forced to become the Ebeneezer Scrooge of stationary supplies and ration the blu-tac out in tiny amounts.

And it is even less fun to be forced to rummage around the walls looking for left over lumps of blu-tac that were left behind by previous bar activators and posters and such.

And worse than that, is the false hope, followed by despair and disgust, when you mistakenly believe you have discovered a little gold mine of blu-tack, and you begin to pick at it to remove it and stick it to your slowly growing blu-tac ball...

...only, as I pick and pull at this super sticky vault of blue-tac, I begin to smell sweet sweet peppermint. Hmm... peppermint, and as I am using my actual fingers to pull and tease this blu-tac free, I realise that it isn't blu-tack, and that for the last minute and a half I have been intertwining my fingers with someones disposed Peppermint Chewing gum, that had been so thoughtfully worked into the Slate walls.

Awesome.