They are hanging out. Who knows what they are doing while hanging out, but they are definitely hanging out.
Here they are at a Jay Z. concert last night in Brooklyn:
In this more detailed photo (arrows!) you can see where they are, incase you couldn't tell by the back of their heads:
Also there in the row directly in front of them are Beyonce (left) Santigold (middle) and Rita Ora (exposed back).