Look, every Euronet ATM in tourist areas is designed to rip you off. They offer "convenient USD conversion" that costs you 8-12% in hidden fees. Always decline their conversion and let your home bank handle it.

Here's what NOT to do: don't use any ATM with English-only interface in tourist zones. Don't accept their "helpful" currency conversion. Don't use ATMs inside hotels or tourist shops.

Use Česká spořitelna, ČSOB, or Komerční banka ATMs instead. Czech bank ATMs give fair exchange rates without predatory conversion fees. Worth walking 2-3 blocks to find legitimate bank ATMs.