Reading books at all the places are democratic.

Family is democratic because it is by the members where everyone is considered to  be important , respected , loved and plays a role in the happiness of the family.
Classroom is democratic when everyone is treated equal without any discrimination on the basis of religion  , caste , etc
School is democratic when the works under the administration , law , rules and regulation when no indiscipline is accepted or tolerated.
Office is democratic when there is division of labour and everyone is rewarded on the basis of work done and not on the basis of any favour or other thing.