I travel mainly domestically for business. I have a United Club membership, and am Star Alliance Gold (also have priority pass). I am taking my family (spouse and 2 kids ages 13 and 11) to Europe this summer. We will be flying BCN-MUC and also BRU-IAD on the way home. Will I need to buy passes for my kids if we wanted to access and of the lounges at BCN or BRU? Am I entitled to just 1 guest or can I use PP for them as well? I appreciate any insight as I am not familiar with Europe or their airports.