Through November 18, US Airways is offering a discount on membership in their US Airways Club. Those that use promotion code CLB30 will get the $50 initiation fee waived, plus bring down the cost of an annual membership to only $325. Furthermore, if you use that promotion code you’ll earn 3,000 elite qualifying miles.
The annual membership fee is usually $450 ($375 for Silver/Gold/Platinum members and $325 for Chairmans Preferred members), so this is a substantial discount. Keep in mind that US Airways participates in Priority Pass and American Express Platinum, though the key benefit here is that this will get you into the United Club as well.
United charges anywhere from $375 to $475 for a United Club membership, so this is a way of getting a minimum of a $50 discount.
If you’re in the market for a membership, I’d say this is a good enough offer to join.