JEERS - To a slippery slope. This one actually would fall somewhere between a cheer and a jeer. We never would question the right to assemble and demonstrate, as health care workers, labor unions and community supporters did this week to call attention to contract negotiations between Nathan Littauer Hospital and a union representing more than 375 workers there. Promoting the event as a candlelight vigil is where the slippery slope comes in. Most associate a candlelight vigil with people coming together in remembrance of lives lost or to show support after a tragedy. For example, the hospital auxiliary's annual holiday candlelight ceremony reflects the spirit of such a gathering. On Thursday night, hospital workers were rallying for contract support. Their gathering was legitimate, but we'd call it a rally.