When we went to Warsaw I found the best way to get an Executive room (and use of the lounge etc.) was to phone the hotel about an upgrade after having booked the hotel on Expedia. The savings we made on breakfast, drinks and snacks easily paid for the upgrade.
TP-Link MR-6400 router > Uptone EtherREGEN reclocker > Sonore Signature Rendu SE streamer > Coherent modified Gustard U18 DDC > Gustard X26 Pro DAC > Belles SA-100 power amp > Usher Dancer Be-20 speakers. 2 x AfterDark master clocks. PS Audio P3 & P10 regenerators. Coherent QP-2 & Zero Zone PSUs.