➒ We’re in the sweet spot for oysters, when the weather is still warm but we’ve entered the months containing the letter R, when oysters have stopped spawning and have the best texture, although bivalve-phobes don’t ever like the texture, of course. (Oysters are safe year-round these days.) Shaw’s Crab House’s 11-day Oyster Fest features half-price oysters all the time, 50-cent pop-up specials, live music, a bespoke beer from Haymarket Brewing and ticketed dinners. Unappetizingly named competitive-eating “slurp-offs” take place in heats over the course of the fest, leading up to a final on the final day with a prize of $1,000 in Shaw’s gift certificates, which at normal times can buy you about 333 oysters. Oct. 5-15. Oyster Bar, Shaw’s Chicago, 21 E. Hubbard St.