https://chromewebstore.google.com/detail/recbooker-drop-in-autoboo/biikmbeokbjfaamdmhgnmlfjhndoijnp?hl=en
RecBooker - Drop In AutoBooker and Notifier - Chrome Web Store
Automatically monitor and notify you of available drop-in program slots at your local community centre.
drop inautobookernotifierchromeweb