I just did a search of bathrooms with cafe curtains. I think that is a great idea!

https://www.google.com/search?biw=1440&bih=713&tbm=isch&sa=1&q=bathroom+windows+with+cafe+curtains&oq=bathroom+windows+with+cafe+curtains&gs_l=psy-ab.12...0.0.0.25252.0.0.0.0.0.0.0.0..0.0....0...1..64.psy-ab..0.0.0....0.ijmzltNQz44

Since both bathrooms are at the front of the house, I (personally) would want the windows treatments to be the same. I think plantation shutters may be out of the budget, based on what I see here, and they typically cover the whole window. https://www.blinds.com/c/plantation-shutters/49

Here is another site where they are less expensive - http://www.shadesshuttersblinds.com/discount_shutters

I think the cafe curtains that 'ak' shows above look great. You can hang them at whatever height you'd like, and they would be easy to take down to wash them. If you sew, you could make your own, and line them, so you could use different fabrics for each bath if you wanted, as all that would be seen from the outside is the lining.

You can also get bottom up shades that only are as big as the lower part of the window, thus they would be less expensive than full height ones. Same with shutters. They can be made just as high as you need. But the cafe curtains are fine; I'd do both front windows the same, whatever you do.

You could also use opaque window film on the lower parts of the windows. I'd check to see how opaque it truly is at night if someone is showering there. It would likely be fine for blocking the view to the toilet.

We did shutters in our master bathroom (above our similar drop-in tub) and I love the flexibility of the 2-tiered shutters for privacy and light options. We opted for traditional shutters (with narrower slats) instead of plantation shutters, but I think either would look great. I also think cafe curtains are pretty and would look great as well.

I went outside to look at the front of the house as a whole and realized that you can see those temporary accordion shades pretty well. I don't think I like those horizontal lines against the siding. So there goes the plantation shutter idea. I've never seen café curtains on a window that wide, but I'm kind of liking it, especially with that different hardware. So would you not do a valance?

Also, I do have some shower curtain material left from where we cut off about a foot to make the curtain fit a stall shower. Could I use that somehow, say sewn at the top or bottom of a café curtain, or would that look weird?

Finally, the house has another set of windows in the garage that are about 10 feet from the guest bathroom window. Does that need a café curtain too, if I go that route? It just seems like such a dirty place to put a curtain (that would most likely be white).

We actually did buy these café curtains awhile back but had the traditional hidden hardware rod and didn't think it did much for the room.

http://www.jcpenney.com/p/cameron-rod-pocket-window-tiers/pp5003270004?pTmplType=regular&catId=SearchResults&searchTerm=cafe+curtain&N=1405 4294289003

Do you think it would work better with a snazzier rod? There is a little detail work around the outside but it's mostly a solid white.

I actually like the look of the more sheer curtains better, but that bathroom really needs more privacy. Would it look weird to have a solid white on the guest bathroom window and a more sheer white on the other window, even though they are on the front of the house? They are separated by a long porch, the front door, and another small window that won't have anything on it.

You can order custom-sized cellular shades from Home Depot and install them yourself for not much money. I think you can probably even get the bottom-up version. As for the garage windows, I would use the least expensive, easiest to keep clean option. As long as the color view from the street is consistent, I don't think the materials need to be the same.

You can even do tension rods on the windows, with perhaps 2 on the master window over the tub, then the rods won't show and there's no holes in the wood. AK's link above shows that a valance isn't needed unless you want them.

If you want to use sheer curtains, you can put frosted window film on your windows, so between the two of them, people won't be able to see through.

Here's an example - http://www.homedepot.com/p/Gila-4-ft-x-6-5-ft-Frosted-Privacy-Window-Film-PFW486/100155257

I have cafe curtains on my garage windows so people can't see what is inside. I didn't need anything higher than that in there.