Just before midnight units for Solomons and Bay District were alerted to 11100 Asbury Circle for the odor of smoke in the building. First arriving unit Engine 31 arrived to find a 3 story recreational facility with nothing evident and Command was established by Chief 3. Upon entering the facility units gained access to the 2nd floor and reported a light haze and requested the assignment to be filled alerting additional units. Units operated for approximately 40 minutes but were unable to locate or duplicate the source.