Modules and classes

I have a module that has a hash of classes and a few methods. For

SERVICES[Services::ServiceA::SERVICE_A_UNIQUE_ID] = Services::ServiceA
SERVICES[Services::ServiceB::SERVICE_B_UNIQUE_ID] = Services::ServiceB

This module is then included in various controllers and models where its
functionality is required.

My question is relating to performance. For every class the module is
merged into is another class ServiceA, ServiceB created? These are not
instances so I think not, but just want to check.