Purple Perk sits in the heart of 4th Street, beside Mercato's and across the street from a Starbucks. With so many eats around, you'd never look twice at Purple Perk unless a friend recommended it.
That's how I discovered Purple Perk. Their food is mediocre for average $10 a plate. The place is often packed because of it's prime location. I see a lot of people sitting at tables for hours reading or working on their laptops. Purple Perk also doesn't seem to mind outside food since I frequently see a woman eating her own food brought in Tupperwares.
If you're in the area, you may notice Purple Perk. But you won't miss out if you walk by it. There's no shortage of better good nearby, but feel free to stay if you need to freeload.