Form over function.

SEE
In Form
What: Consider what was and what could have been at a 50-year retrospective of forward-thinking Boston architectural designs both realized and imagined.
Why: Check out the sleek new BSA Space (the lime green staircase is a mind-blower).
When: Fri.-Aug. 31. Daily, 10 a.m.-6 p.m.
Where: 290 Congress St., ste. 200, Fort Point (617-391-4039). Free.

ENJOY
Sex at the Zoo
What: Birds do it, bees do it, but find out why and how during a stimulating lecture on the Wild Kingdom’s mating and relationship habits (hint: They’ve got the courtship thing down).
Why: A rare chance to drink wine and gawk at gorillas.
When: Fri., 6-8:30 p.m.
Where: Franklin Park Zoo, Tropical Forest Pavillion, 1 Franklin Park Rd., Dorchester (617-541-5466). Tickets ($20-$35) online at franklinparkzoo.org.

SLURP
Mare Oyster Bar Opens
What: Frank DePasquale reinvents his coastal Italian restaurant as a bivalve destination shucking regionally sourced oysters and a more seafood-centric menu of hiramasa ceviche, truffle-crusted tuna, and hot and cold lobster rolls.
Why: The decadent bacon cheddar burger creates an omnivore’s ordering dilemma.
When: Opens Fri. Tues.-Fri. & Sun., 4-11 p.m.; Sat., 11 a.m.-11 p.m.
Where: 135 Richmond St., North End (617-723-6273).

MEET
Annie Selke at Hudson
What: The local Dash & Albert rug proprietor signs copies of her cheery new book, Fresh American Spaces ($45), which offers tips on cultivating inviting home aesthetics.
Why: Dig on Hudson’s new digs (and spring stock) while enjoying Buttery cupcakes and cava from Brix.
When: Sat., 1-4 p.m.
Where: 12 Union Park St., South End (617-292-0900).

LEAVE
Vermont Wine and Chocolate Weekend
What: Condense your getaway and V-Day desires into one 36-hour smorgasbord of New England sips (mead, wine, ice cider, cassis) paired with winery-made sweets like triple-chocolate balls and cherry brownies.
Why: You sorta maybe forgot to book a table for Tuesday.
When: Sat. & Sun., noon-5 p.m.
Where: Go to vermontgrapeandwinecouncil.com for participating wineries. Tastings are free.

Photo: Courtesy of Over, Under