MVC - Filter DropDown List in With Where Clause

Here is a super-simple way of filtering the content of a dropdown list populated by a controller.  For example, say this is your primary table of selectable items.  However, you want to exclude items that are not marked as "visible". 

id	title	visible
1	San Diego, CA	true
2	Los Angeles, CA	true
3	Austin, TX	false

DropDown List (razor format)

@Html.cities("id", String.Empty)

Original:

ViewBag.cities= new SelectList(db.cities, "id", "title", myitem.cityId);

Modified:

ViewBag.cities= new SelectList(db.cities.Where(g => g.visible == true), "id", "title", myitem.cityId);