Two signs
There is a bike rack a few feet from here, but I can't resist parking this way. I was locked here while making the pick, not just for the pic.
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Just to be clear, I have two signs on board, there are at least 5 NO BIKES signs in a row there and at least as many on the other side of the enterance to this horrible for messengers government building which we have never been allowed in and now go through laborious screening just to pick up from a courier box within sight of the entrance.