Here in the UK you pay a higher price per pastry to eat in at the
local Starbucks. Having been in the USA, UK, Thailand and Australia in
the last six months I don't remember seeing this policy elsewhere.

Do anybody know where in the world you pay extra if you want to eat in
at your local Starbucks?

In the America Starbucks encourages lounging and I think there would
be an uproar if customers were asked to pay a higher price to eat in
than take out.