Is "Where do you sit?" correct for asking someone where their workspace is?
Solution 1:
"Where can I find you?" is generally a safe way to ask.
If you prefer to be specific, "Where do you sit?" or "Where's your desk?" would be fine in an office with an open plan.
If the offices have dividers, you might want to ask, "Where's your cubicle?"
If actual walls, "Where's your room?" might make more sense.