POTUS-elect declines membership
But notice the emphasis on the phrase "right now." Maybe he will join at a later date. The Club is willing to keep the invitation open.
Mr. Obama's emphasis on weatherization and alternative lighting reminds me of President Carter's admonition to turn down the thermostat and wear cardigan sweaters. Maybe it works as a short-term sound bite, but it is not much of a long-term policy.
Addendum: The Washington Post confirms its membership.