We have a nest thermostat that we run off a sensor in our infant's room. At night and during his naps, it's 69 in his room, which leaves the rest of the house (including my toddler's room) somewhere between 65 and 68.
When nobody is napping or asleep at night, we have it set to 65 (using the baby's room sensor), and during those times the rest of the house ends up somewhere between 65 and 68 degrees.
In our own master bedroom, we have an electric mini sleep that is set to 64 most of the time.