Regarding SAN, the Airspace Lounge in T2 East is now an official option for Alaska Lounge members, listed under ‘other partner locations.’ For the time being, that’s only a good option for people flying to SFO out of Gate 26 (all others would have to change terminals and reclear security). But this means SAN passengers should have a partner lounge available on day 1 after Alaska relocates to T2 in 2019. (FYI, footnote on the site says it cannot be used for arrivals.)