I have been once a few years ago, can't claim anywhere near the experience of the previous poster

but did have some luck on SA when I was there. Building on the previous advice about civvies, my suggestion would be to subscribe to SA for a month before going (if you're not already a member), and arrange a few dates. Remember it's not like AW or escorting generally, it's essentially dating, but, if you get the right vibe from a person you can maybe in advance arrange a PPM meet (although don't use that term, and not on the app, on WhatsApp or Telegram). Expect to go to a bar or restaurant, chat, get to know her and be charming, then head back to your hotel or whatever for anything between 150-300 EUR depending on how you get on and her experience/expectations. Might not be your cup of tea, and probably more expensive than some other options, but definitely a possibility, and the girls tend to be civvies/students doing it for a fun side hustle, rather than more hardened escort types. TBH, this would be my advice for most European cities really.