How do I edit a place?

To edit a place from the web, click on "Suggest an Edit" under the place name to bring out the following module:

From here, you can submit changes to the place's address, website, category, hours, place details, and more! Your suggested edits and merges may not go through immediately if a place is popular, claimed, or has lots of check-ins. We want to make sure others also have a chance to weigh in! 

To edit a place in Foursquare City Guide, select a place,  open more information and scroll all the way down. Tap, 'Suggest an Edit' and you'll see the same options as on the web. You will also be able to report a problem with the venue, including whether it is “closed or out of business,” “has incorrect hours” or “is not public.”