Try out Craft Client and Pro on multiple development URLs?
You can always use this "super-cool feature" with sub-domains of "craft.dev" or "ontherocks.dev"! You can have as many as you want:

"craft.dev"
"pro.craft.dev"
"license.craft.dev"
"testing.craft.dev"
"is.craft.dev"
"super.craft.dev"
"cool.craft.dev"

:D