Starting tomorrow, Starbucks is having a happy hour on all their frappuccinos from 3-5pm daily until May 15. The frappuccinos are fully customizable and since Starbucks made the switch to a non-dairy syrupy base, the beverages can easily be made vegan by replacing the nasty dairy milk with the soy alternative.
I'm really excited for this event and will probably be at Starbucks every day, especially if the weather is a scorcher. I went fairly religiously during the happy hour last year and was able to try almost every variety (some twice). Just be sure to request no whipped cream as the baristas often top the drink with it by default. Also, steer clear of the caramel sauce, as that is reportedly not vegan.