As to LH, you are confusing the Hon Cir/First Class Terminal and lounges in FRA and MUC with the Senator/First Class Lounges. Two different worlds.
An F boarding pass on a Star Carrier other than LH will get you into the Senator Lounges, which LH marks as first class lounges. They are not. They are dreadful.
The NEW Hon Cir/First Class Terminal, which you enter ground-side, and the new Hon Cir/First Class lounges, in the terminals, are heaven. But you have to flying on LH. LH is ignoring the Star Alliance rules. Other boarding passes will be turned away.
Originally Posted by kevinsac
Tucked right behind my passport, I carry a page which is torn out of *A brochure. Very explicitly, it states that on your day of travel, if you are in F/C, you can use any *A F/C lounge of any *A airline. I show that to the matrons and .... sometimes with a shrug, sometimes with a phone call to check with a super ... I always get in!
Yet, I know the LH F/C Terminals in FRA and MUC are off-limits unless on LH, but *A passengers can still use the F/C lounges in the main terminals.