Join Date: Jun 2001
Location: Copenhagen, Denmark
Programs: SAS EBD, BA Gold, Bonvoy Titanium, Hertz PC, National Exec Elite
Posts: 553
Technically you're not guaranteed Business Class/Club upgrade as Concierge (as opposed to most other hotel top tiers). Just a vaguely described "better" room.
But the US Radisson Blu's seem to offer that as the default upgrade to Concierge members, so I'd just book the basic room and count on the upgrade, if I could live with a small chance of not getting it in case they are sold out.