I’m looking into making some game boards as foldable cloth for easier storage. I’m not currently interested in neoprene as it tends to be 2x more expensive than most cloth options, even if staying straight on a table is very desirable.
Asking here because the boardgame communities seem dead
If you’re most concerned about it not moving about, there are lots of options designed to keep table clothes from moving.
Clamps: https://www.acehardware.com/departments/home-and-decor/kitchen-utensils-and-gadgets/tableware/8084084
Weights: https://www.wayfair.com/Winston-Porter--Suttle-Table-Cloth-Weight-Accessory-X114748759-L1228-K~W003637648.html
Bondage: https://litoluxury.com/products/litocloth-straps-one-pair