You mean the ARN T4 domestic lounge? Well, you swipe your EBG card for yourself, then your BP for your spouse/guest. Only works for EBGs though, and because on SK EBG cards are used as FOID in place of a BP.
Similar to the fancy gate at the SEN lounge in MUC. Here we (wife and kid) used to squeeze into the trap door they had there. With two kids we have to detour via the main entrance
