I was wondering if a lawyer amongst us could give an opinion on a possible Class Action aginst hotels for tacking on an unpublished energy surcharge which is not revealed at the time of booking.

This is simple bait and switch. Energy consumption is a part and parcel of running a hotel. It is the cost of doing business. There is absolutely no reason why hotels should not include this cost in the rate they quote people.

However they are quoting people a different rate and charging them another. This is not for an optional service like parking but for a necessity. For people who reserve their rooms though pre-paid services like Priceline, there is not even an option of walking out of the door to a different hotel. You are compelled to pay a different rate than what you were quoted.

Is there any legal recourse to this? Please advise.