Love Instagram? Join Flipboard, Doctor Popular and Postagram on Saturday, October 27, for an “Instawalk” around Warm Water Cove Park in the Dogpatch neighborhood of San Francisco. An Instawalk is a photo walk where participants use Instagram to take pictures as they walk, using hashtags to share the shots among the group and with their followers. Instawalks happen all over the world, join the upcoming one in San Francisco. Click here to sign up for the walk.