They did have tables; the long 4 foot X 8 foot ones. However, as I sewed, the vibrations in the table caused my sewing machine to bob up and down. I had to use one hand to press down on the machine to keep it from hopping around! :-)
I saw several quilters with portable tables that had a drop down slot to hold their sewing machines. It was my understanding that you could tell the manufacturer what type of machine you had and they would provide the insert to fit securely around your machine.