With the future of the Jonas Brothers in peril ... and a big decision looming ... Joe Jonas ventured out alone today -- rollin' solo in L.A.
As we've reported ... Joe, Nick and Kevin are deeply divided musically and are expected to decide the fate of the band this weekend -- whether they'll stay together ... or go their separate ways.
24-year-old Joe -- the middle brother -- hit up SoHo House in West Hollywood this afternoon ... sans brothers.
Maybe he's trying it on for size.
Waiting for your permission to load the comments.