Everyone’s in on it.
Boston Cocktail Summit
What: The three-day, citywide homage to all things shaken, fermented, and stirred includes dozens of demos, seminars, and tastings to whet your wassailing whistle.
Why: Make your own vermouth, embrace absinthe, and master artisanal mixers.
When: Thru Sat.
Where: Locations and details online. Tickets ($25-$50) at bostoncocktailsummit.com.
3-D Printing Party
What: The MIT minds behind algorithmic jewelry line Nervous System create new pieces on the fly using the mesmerizing MakerBot Replicator 3-D printer (you have to see it in action to believe it).
Why: Make it the first stop in your First Thursday reveling.
When: Tonight, 6-9 p.m.
Where: Room 68, 68 South St., Jamaica Plain (617-942-7425).
Bell Tower Foods Launches
What: The mobile grocer plugs the city’s fresh produce holes, hawking fruits and veggies in underserved areas of South End, Roxbury, and Dorchester.
Why: Stock up on bread, rice, beans, and spices later this fall.
When: You forget the onion for tonight’s tomato sauce.
Where: Follow @belltowerfoods on Twitter for times and locations.
What: More than twenty regional beer makers put out limited-edition and small-craft tastes among live demos and ready-to-chat brewmasters.
Why: Check out the just-opened New England outpost of Dylan’s Candy Bar. (Oh, and you can leaf peep on the ride down.)
When: Sat., noon-4 p.m. & 6-10 p.m.; Sun., noon-4 p.m.
Where: Mohegan Sun, 1 Mohegan Sun Blvd., Uncasville (888-226-7711). Tickets ($20) at ticketmaster.com.
Photo: Eliza Claire Photography / Getty Images