Question says it all: I'd like to hang a "light" load (say 30 t-shirts/pants) between two concrete pillars, without doing anything permanent to the pillars, like drilling (they are public property and this is for a temporary event).
The pillars look something like this, except are thicker and farther apart:
I have 4mm x 30 m braided rope and would tie it around the pillars, but am worried it will slip down. This is outdoors and should carry the load in wind at 2x head height for several days, but doesn't need to be more permanent than that.
Budget solutions are also preferred, thanks!