If you're visiting Chelsea, or are a local resident who is between errands and dropping kids off to their various activities, it's nice to be able to stop and check email or look up something on the Internet. Perhaps you need to double-check the address or time of an event you found on the Things To Do In Chelsea website. :)
For your reference, I recently added a page to the Things To Do In Chelsea website listing places that offer free wireless access (WiFi).
Note: Free wireless often means "free with purchase". So be a good neighbor and buy a cup of coffee or something while you're there!