Palo will be at Dining Changes. It'll likely be Triton Lounge, but check the app once you get to Port (it'll be listed as an activity). People will also line up before the start time, so keep that in mind.
There's not a specific spot for beverage seminars, so Guest Services would likely be your best bet. As PP noted, you can also book those in the app once you get to port (and are connected to ship wifi so the app goes into 'ship mode').