I received a call from this (unknown) number.  No message was left.

Must be spammer. Called with no message left.

We're gonna turn you on, we're gonna bring you the power........ We're the Electric Company!
Oh, yes, Rita Moreno and Bill Cosby are gonna teach ya' with some far out word association games.

Claiming to conduct energy audits for those with high electric bills.

Keep calling but never leave any message.