Originally Posted by Stil

That is actually a really good point! And with a line like that there would be grounds for two lines, one for the Business and one for the Gold lounge (if it was not a technical issue in this case).
The potential problem with two lines are that the paid entrance pax. probably, for a large part, have no clue about which lounge they have access too. There has to be very clear signage for admittance to the two different lounges, other wise I suspect they will end up in both.