The Crepe House in Russian Hill on the cnr of Clay and Washington fits perfectly as a great place to take a date.
You want to go to The Crepe House when its quieter on the weekends: around 2 to 3pm. The goal is to grab a table right at the back in the corner. If you notice, there is a bench at the back which allows you to sit next to your date and allows you to talk at a comfortable volume.
The staff is friendly, there is nothing on the menu greater than $10, there is cool moroccon/middle eastern music playing and they have a simple collection of beers. Some favorite dishes:
Chicken Pesto Crepe
Miami Heat Crepe
Caution: do not go at a time when this place is super busy as the rest of the tables are cramped together and it can be a little loud.
Check out The Crepe House website and the reviews on Yelp.
The google map is here:

