At the time of this writing, Edinburgh is considering a £2/day tax for visitors ($3.12 USD). The Daily Mail Online reports this tax would be added to hotel bills, with the rationale that it will "not make a big difference when most hotel rates in Edinburgh start at £50 or £60."
No need to single out Edinburgh. These taxes are being added to the cost of hotel rooms and other travel services all over the world. Wherever politicians are looking for a way to raise revenues without losing votes, expect these sorts of charges are bound to increase and multiply.