I assume you don't really mean lunch spots, of which there are a number! If you mean launch spots, anywhere in Lauderdale By The Sea is legal. Just don't hit anybody launching, etc. City code frowns on sailing inside the vessel exclusion buoys within LBTS, anywhere in FL really, but it's not heavily enforced because of lack of incidents in LBTS.
I sail frequently in Fort Lauderdale at Vista Park, just south of Oakland Park Blvd. Same caveats there. Fort Lauderdale is more restrictive.