A network system receives a service request sent from a computing device of a user. The service request identifies a service to be provided by a provider and a service request location. In response to receiving the service request, the network system identifies a plurality of candidate locations. The network system selects the location from a plurality of candidate locations according to predetermined criteria including a frequency measurement of each candidate location. The network system replaces the service request location with the selected location. The network system sends the selected location to the computing device. Responsive to receiving an acceptance of the selected location from the computing device, the network system generates navigation instructions for the provider from a current location of the provider to the selected location.