Pond
Most of the time people look at the environment or the ambiance of a restaurant before eating. If they are looking to eat at somewhere romantic, they would choose an appropriate location where to eat. Wouldn’t it have more impact if a restaurant would have a little garden or maybe a small fountain or a small pond? It would make it look a bit more serene and would be able to set the mood. The people may want to eat beside the pond and look at the flowing water which of course are kept flowing by pond pumps. Or it could be they will be eating near a small fountain. Having a fountain or small pond would also make the place a bit cooler which may be more attractive for possible customers.
