If you live near a college or university, you have a large variety of events going on right in your own back yard for little to no money. Simply stop by the school and pick up an event schedule to see what is going on.
Universities typically have something going on every day of the week. Guest lectures come in from out of town to give talks on a variety of different subjects. Music recitals from visiting musicians as well as college music majors can often be found. Art exhibitions and plays are also common. Sporting events take place on a regular basis as well as cultural activities.
Taking advantage of all these events is a great way to spend time with a significant other and most will cost nothing.