Posh parties hit San Francisco and San Diego this week. It’s a chance to mingle with fashion and style bloggers, Poshmark sellers and people who get how stylish secondhand can be. You’ll need to RSVP to attend. After that, dress up and head out. Think of it as a reason to celebrate summer. Because no matter how confounding that drizzle-slash-misty weirdness we’re experiencing an extremely high volume of right now gets in San Francisco, a good outfit scored at a jump-for-joy price can put a girl in beach spirits in no time. RSVP goodness here.