Śródmieście

EU/EEA/Swiss citizens no visa. Many others (US, UK, Canada) can stay up to 90 days without a visa. Check with Polish embassy.

Polish złoty (PLN). Credit cards widely accepted, but carry cash for small shops.

Yes, especially in tourist areas, hotels, and restaurants. Younger people speak good English.

Take the S2/S3 train to Warszawa Śródmieście (~20 min, ~$1). Taxi costs ~$10-15.

Pierogi, bigos, żurek, and paczki. Visit a milk bar (bar mleczny) for affordable traditional food.

Yes, tap water is safe and of high quality.

Smart casual; no sportswear or flip-flops. Some upscale clubs require collared shirts.

Generally safe, but avoid empty carriages. Night buses and trams run regularly.