I just had an interesting experience on arrival to HEL. I tried to access Schengen lounge on arrival, as it has been an unofficial perk for Plats for a long time. The dragon told me it is only to use the showers. Well I told I was just going to wait for colleaques for a while and I did not need a shower (or was I smelling???). So she turned me away.
I must say it is a nice touch to offer this soft perk, but YMMV