If you have a friend that has a cat you can definitely test it out by borrowing a cup or two of litter.
Baths are notorious for this due to the extra moisture from showers etc. Air flow may pose bigger results.
Coffee absorbs smells too. Just pour out some (dry) coffee into a small bowl. I have used the coffee that comes in the filters as well. Just place on a small plate and place in the bathroom.
With coffee at 12 to 15 bucks a pound I'll think the cat litter is bit easier on the wallet...you could also just pick up a few scented candles...the candle may not "remove" the smell but they can displace it a bit.
Oh I agree you wouldn't want to use coffee on a routine basis. I meant for short term.
Thanks folks. Ended up using good ole' fashioned baking soda! Next on the list: how to get rid of rust in the toilet bowl! I'm trying to get this unused bathroom usable.
I would clean the bathroom from top to bottom with a disinfectant or warm water, soap and just a splash of bleach. It sounds like you may have mold somewhere in the walls or floor. The bleach will disinfect the air in the bathroom also. This could still be a problem after you use cat liter or coffee. If your bathroom is on the main floor, check downstairs for mold or mildew on the support beams directly under the bathroom.