Hi Brian,
I don't know any board gamers in Wroclaw, and the ones I know are into the competitive ones you mentioned. Not to say they would not be into other board games but travelling from Warsaw to Wroclaw might definitely be one too far for them. There is a Warsaw board game group on Facebook - if you're on there - and they may be able to help you find others. Just a note: Ad-hoc won't work, IMHO.
If time is your objection to RPGs, and *importantly* you can manage your schedule to set aside some time for yourself, you might try episodic games of RPGs. Many 90-minute games are promoted in the USA and Western Europe at retail stores. This tells me there is a possibility to play even 90-minutes. (I am not into episodes but prefer whole campaign story arcs myself.) Lots of tactical tabletop wargames are promoted at RPG stores in Poland, where the locals confuse RPGs with wargaming. You might want to hang a sign there too. Few Poles actually role-playing in English I have noticed, FWIW. They speak in mechanics rather than in character - very much like playing with Data from Star Trek.
Great way to practice English for the proficiency-level student. You also might want to consider mixing business with pleasure if you can be a Game Master and time is too short.
Good luck.
maybe someone on this thread can help:
Wasaw (PL) Tabletop Role Playing Game Group for Expats Only. D&D Fortnightly
Thanks for the plug, Wroclaw.
Nice to see the Thread gets noticed and read. I appreciate that.
Good idea to contact us even if we're not an exact match. We do have contact with "others" too. LOL
Cheers!