Depends on the pan and pancake. Restaurants use a fair amount of fat in their dough so fat on the griddle isn't needed, if you make your own batter (as opposed to store bought) you can control this and reduce the fat such that you need to add some to the pan. The pancakes will of course taste different. In my case I'm making sourdough on cast iron - I've never figured out the trick to make the first couple not stick (whatever I cooked the night before affects something)