If you’ve been to Sundance or South by Southwest this year, you may have come across Say OK’s work. The 2-year-old experiential agency, which has offices in Los Angeles and Seattle, creates fully immersive experiences for brands like Microsoft, Converse and Google. “We pride ourselves on getting those people who think they know better, who can see right through the traditional side [of advertising], and hit them in a cool, unique way,” said founding partner Casey Conway. For example, the 12-person shop launched Google’s music streaming platform, Google Play Music, at last summer’s Wanderlust yoga and music festival with an immersive experience that featured, of course, yoga, music and meditation. “It’s not about a brand just being the logo [in an immersive experience]; it’s about giving the consumer an awesome…