Yes, still very common for centers to take over approach control responsibility, generally after 2100-2200local when the approach control closes. Off-hand, it happens in parts of Oregon, Washington, central CA. That's in addition to the may more uncontrolled airports (or Class D with no associated approach control) for which the center always handles those duties.
Don't forget the center controllers who provide clearance delivery on the ground for aircraft awaiting to depart, too (obviously only works if there is an RCO nearby).