We also have a night in where everyone makes an appetizer for dinner.
We do that too!
Other traditions (some sadly in the past, as a few of these are no longer in existence):
-arrive; go to Publix, thank goodness we don't have to go to PCB for groceries anymore
-take bottle of wine to beach at Seaside around dusk, watch sun set
-rent bicycles
-lunch: oyster, shrimp & grouper basket at Seagrove Market
-make pass through Perspicasity
-dinner at home: lobster tails from Goatfeather's with that DEVASTATING garlic butter they sell
-junk shopping at Summer Place at the east end of 30A
-lunch: the Greek place in Grayton (I think he's not there any more

)
-anytime: Oysters Seaside on the roof at Bud & Alley's
-bike ride on bike path - Seaside to Grayton and back
-scope out the clearance table at Patchouli's (back when it was in Seaside)
-late night walks on the sandpaths at Seaside
-at least one game night - Taboo, Charades, cards
Sigh. Wish I were there now.