Melted Rubber Stains on Tablecloth?
Try Goof Off. It advertises right on the can for asphalt and Tar. I used it successfully on a nylon carpet for the same issue with an electronic piece of equipment. Test it on an inconspicuous place first.
Rubber Stains on Carpet?
Goof Off works well. Test it on an inconspicuous place on your carpet first. Then use Cotton Balls and a clean rag to dab and wipe.