Thank you Michal, your answer is perfect.
To be fair, I've discovered the custom swql resource few days ago thanks to the discussion in this post:
Hidden Gem: The Custom HTML Resource
As you can see I customized one swql resource with brief details of the AP doing a query like this:
SELECT ap.DisplayName, ap.Clients as Num_of_Clients, ap.WirelessType as AP_Type, round(ap.InBps,2) as In_Bps, round(ap.OutBps,2) as Out_Bps, c.DisplayName as Controller
FROM Orion.Wireless.AccessPoints ap
Join Orion.Wireless.Controllers c on ap.NodeID = c.NodeID
Where ap.IPAddress = '${IP_Address}'
That said, yours displays connected clients information directly and so it can be integrated very well with my table, thanks 
Just another question:
since the Thin APs can't be polled via snmp, orion sees them as "Unknown" devices, thus I have the 'Uknown devices view' applied to them and the custom swql resource will be visible (but blank) also in other type of Uknown devices.
Is there a way to create your own type of devices? Or to assign the view to specific nodes?
The best thing would be the possibility to assign views based on custom properties, because in this way we would have the maximum flexibility.
Thank you.