Drive up to the local mountains for a picnic and some gentle hiking.
Drive out to the desert for some sightseeing, and then for dinner at either one of the casinos or other yummy restaurants in Palm Springs, spend the night at an inexpensive motel with a pool and a hot tub, have breakfast at a cute cafe and drive back home. Or if you’re in Palm Springs, drive out there early, have breakfast, then take the tram to the top of the mountain, frolic in the snow for a couple of hours, come back down and have dinner.
Go to the movies and then out for lunch or dinner.
Drive to one of the local casinos (within a half an hour drive) and have lunch at the buffet and maybe play a few penny slots.
Take a couple of friends to a fancy restaurant just for coffee and dessert.
Take a stroll on the beach and have a picnic. Pick up some picnic fixings at Whole Foods or some other place that has interesting take out.
Visit your local botanical garden, then have lunch at a tea room, where they serve those little sandwiches with the crusts cut off with a nice pot of tea and some delicious pastries.
Go to the zoo and have corn dogs and ice cream for lunch.
Take a nice scenic drive to one of your neighboring towns and have lunch in a little cafe to which you’ve never been. Visit a local museum or historic house/building if they have any.
If you live near the water, take one of those sightseeing trips around the harbor, most of them offer lunch.