I have a 3hour stopover in FRA coming up very soon and flying on a coach ticket. I have priority pass and an AMEX gold that I have been on the fence for a while now about upgrading to platinum. My concerns for my layover is that I have a nice place to relax with a shower. Are there decent enough PP lounges with a shower in FRA or is is worth upgrading my AMEX card to platinum to have access to the Lufthansa business lounge? Thanks in advance for your help! Also as an FYI, I will be in terminal 1.