Roller Coasters is an open-ended challenge project available on Codecademy - a couple of data frames plus questions to help you test your skills & knowledge. There are so many different ways of going about completing this one. 

You may consider attending if - 

• you have tried your hand already and would like to compare solutions or ways of going about things (my favourite part about meet-ups!), 
• are planning to do so in the future, or 
• would simply like to have a taste of data visualisation.