Woaba Boba is a drink store near Wellston High that sells boba tea. John and Seraphina hang out there, most of the time after school. John has also invited Arlo there. It could be considered a commonplace for some of the characters to gather and discuss. It seems to mainly sell bubble tea and other drinks such as coffee.
After finally getting an 'A' (Actually an A-) on their literary analysis project, John and Seraphina celebrated by going to Woaba Boba together for the first time. 
John takes Arlo to Woaba Boba as repayment for giving him a file binder. 
As the name suggests, Woaba Boba sells boba tea in a variety of flavors, as well as coffee. John's favorite flavor is mango.
- Aria: Waitress