For the full experience this year, I think Cocoon is going to the only event that does music on both outdoor stages and then also continues in the club.
As I understand it, tonight for Radio 1 the club will also open at 23:00 although they are stressing that it is not being programmed by R1 (the official After Party is at Amnesia) and will instead be run by 528 themselves
So tonight and 24 September is the real answer (and maybe if they sell enough tickets, SHINE on 25 September could also follow same route? Big ask though)
That said, many of the Pikes Presents dates and the bigger named Friday/Sunday parties (FUSE was mega last weekend, Kaluki is picking up each month, Josh Baker and Max Dean's dates will be huge) are great parties, although only one stage - and normally the Garden Stage.
There will be a couple of exceptions where they use the Grand Park Stage instead. That the old Tree House Benimussa area for any oldies