Do you mean the warehouse, or are you in Tarkas trying to find where the artist lives? If we are talking about the sculptor, he lives near the entrance of Tarkas, south-west corner of the very first screen, near the gates.
If you mean the warehouse, it's in Solina. Enter the city and go straight west to find the docks, then ask around.
Oh, I see what's going on. The strippers' routines and the quest were created at different times. In theory, you should be able to eventually ask about it, but if you have bad luck you might get stuck paying the stripper for a while. Better to make sure the protagonist can't get "distracted" during the quest, thanks for letting me know.