I’ve been a Delta Sky Club member for 3 years now. My membership expired last month and I’m waiting to settle into my new position before requesting lounge membership.
My logic is that even though Charlotte only has 2 US Airways clubs and no other clubs, I use the club most often on layovers. My layovers are usually either Atlanta or Terminal 2 of ORD. Both of those locations have Delta Sky Clubs. Also, Delta has had free alcohol for years while US always had cash bars. Now US does have some free (except in PA) beer and wine so the value is coming up a bit.
I used to have United Red Carpet Club which gave me access to the US Airways clubs when flying US, but not other times. I believe this has changed so maybe I investigate rejoining the RCC since I have status with United, but in Atlanta that leaves my lounge prospects very limited.
I do have the pay-per-use Priority Pass that comes with the Hilton Surpass card, but I can’t bill that back to my company. They will pay annual membership for 1 lounge, but not a per-visit fee. They also won’t reimburse credit card annual fees such as the AMEX Platinum charge card or else that would be quite tempting. I will be evaluating my travel plans over the next few weeks and figure out what meets my needs the most in terms of access and amenities.