I am always searching for a way to hang the banner. In the past I have used the tiniest black clips i could finda nd just pinched a tiny bit oft he table cloth.
However, I just had what could be a wonderful idea. I've never tried it, but will for my next show. MAGNETS!
You would just get two for each corner. Put one underneath the cloth, then the banner, then the second magnet. I need them on the bottom corners because I store my banner rolled and it curls. You could also put one in the middle if your banner is heavy. Mine is very lightweight.
I am going to buy some before my next show and try it out.