The amount of misinformation in this thread is unbelievable, but not really surprising So that we're all clear here:

* 1P, 1K and all other Star Alliance Golds on an international itinerary get access to any Star Alliance Gold lounge. To my knowledge, EVERY SINGLE RCC is a Star Alliance Gold lounge. Class of service does not matter. There is no requirement to use the lounge of the carrier you are flying.

* Every non-UA, non-US Star Alliance Gold gets access to any Star Alliance Gold lounge on any itin, PERIOD. This includes entirely domestic USA itineraries.

* Any RCC member is entitled access to any RCC with presentation of the card

All of this nonsense about "designated lounges" or "class of service doesn't grant lounge access" is exactly that: nonsense