On Sunday, April 29th, celebrate bivalves and birthdays at B&G Oysters. Just in time for their 10th anniversary, B&G is bringing back the Oyster Invitational, a South End block party celebrating everybody’s favorite briny bite. Head to Waltham Street to see local oyster farmers and purveyors partying with chefs, forging relationships, and serving up delicious seafood for you to enjoy. There will be shucking classes and competitions, DJs and demos, an auction to benefit the Barbara Lynch Foundation, and bites from chefs at local spots like Eventide Fenway, Drink, Babbo, Row 34, Island Creek, and (duh) B&G Oysters. General admission is $135 from 1:00-5:00pm, which gets you three drinks from the beer, wine, and cocktail stations plus all-you-can-eat oysters (yes, you heard us correctly), and access to the rest of the fun. VIP passes get you in an hour early with a special reception with Barbara Lynch, and run $185. This event is rain or shine; snag your tickets here.