There is currently a second tier 6N played on the same weekends. In fact there are several tiers of European rugby which teams can work their way through untill they hit the glass ceiling. In Europe you can move freely from 37th to 7th based on your results but it is currently completely impossible to move from 7th to 6th.
Its hard though as there is absolutely no room for more internationals and the chances of reforming the 6N is about as likely as Quins fan making their own Pimms!
Edited to conform to authorised Quins stereotype...