The Weekend Playbook: A Treasure Island after-party and a Berlinetta pop-up

Freebie of the Week El Rio (that lower, lower Mission bar with a great backyard) is turning 35 on Saturday, and to celebrate they're hosting a big party with no cover, free BBQ, half-off drinks from 3-5p, five bands, and burlesque.Thursday, October 17thYou still have a chance to register for the Glow after-dark bocce league which, much like Dr. Manhattan, has glow-in-the-dark balls.Hit up McTeague's to get your Twang on. It's a country line-dancing party with $2 Shiner Bock bottles and $1 pulled pork, chicken, and carne asada tacos.Friday, October 18thTo celebrate the completed remodeling of their Union Square location, Goorin Bros. is hosting a customer appreciation party from 1-5p today, complete with free drinks and a raffle for their super swanky hats. The guys from Big are starting a Friday pop-up in the Berlinetta Lounge, so if you've been missing amazingly crafted cocktails, now's your chance to get 'em.Saturday, October 19thMake sure to RSVP to the official Treasure Island Music Festival after-party, otherwise you won't know the secret location.If you've been looking for a chance to try out all the restaurants popping up in Jack London Square, what better excuse than a classic car show?Little-known fact about art studios: when they have open houses (like today and tomorrow in North Beach and the Haight), they usually provide free booze.