Well....the only thing I can think of is learn to live with it. Spraying Seafa's butt with water will persuade him to jump down when you spray him, but from my experience with cats, if they want up on the table/counter/cabinets/whatever, they will get up on the table/counter/cabinets/whatever.

CJ actually has his own chair at our dinner table. Sometimes he's happy to stay on the chair and eat with us, sometimes our dinner is much too tantalizing and he must get a closer look by climbing on the table - yes, while we're eating. Do we discourage him? Well, if you call giving him little pieces of chicken while he's up there discouraging him, then yes, we discourage him.