The annual Jam Cruise, departing from Fort Lauderdale on January 9, has long been sold out. But the onslaught of music cruises leaving from South Florida is the gain of land-bound music fans, thanks to the requisite kickoff shows open to the public. The Jam Cruise has always been particularly generous with these preparties, spreading the fun out over a couple of days. This year, the kickoff shows run on Saturday and Sunday nights, again at Revolution, but this time anchored by Chicago-based jam-scene legends Umphrey's McGee. The group favors multiple sets and live experimentation but has always been known as one of the harder acts on the jam scene, thanks to admitted influences from heavy prog and even metal acts. Keeping with the flavor of the times, though, recent years have seen the group headlining in a more electronic-spiced direction.