Star Trek

They also mentioned and/or used toilets in ENTERPRISE

In Similitude

SIM: (sitting in the hatch of pod one) I was all ready to do it.
ARCHER: What stopped you?
SIM: Where the hell was I going to go? We're nowhere near any habitable planet. Didn't really want to spend the rest of my life floating around in a shuttlepod which doesn't even have any toilet facilities. Can you imagine a lousier way to spend your old age? Cooped up in that thing, peeing in a bottle? Actually, I can imagine a worse fate.
ARCHER: What would that be?
SIM: Being stuck in there with Malcolm. Damn, this is a screwed up situation.
ARCHER: I can't argue with you there.

In Observer Effect

ARCHER: Trip, how you feeling?
TUCKER: Like I've been gut-punched by a Tellarite.
HOSHI; Doctor, should we start with the bio-gel?
PHLOX: Not until we know what we're dealing with. Three other landing parties returned from the surface with no ill effects.
ARCHER: We need to check out the shuttlepod, too. See if any of its environmental systems were at fault.
TUCKER: I can do that, Captain. I should've thought of that myself.
ARCHER: Stay where you are, Trip. Phlox needs blood samples.
PHLOX: Here's the medkits.
(he puts them through the decon chamber wall but as Hoshi comes to get them, she starts coughing)
ARCHER: Hoshi, what is it?
HOSHI: Before Commander Tucker passed out, he started coughing.
PHLOX: Are you feeling any other symptoms?
(she dashes into the bathroom and throws up)
TUCKER: I'm going to guess that's a yes.

And again in a deleted scene from Unexpected

TUCKER: If you'll excuse me, I'm not feeling very well.
T'POL: Perhaps a little lunch might help. I hear Chef has prepared Rigelian sausage. (Tucker groans) Being vegetarian I can't speak from experience, but I'm told it's quite succulent.
TUCKER: I think I'm just going to go lie down for a while.
REED: Commander, if we tune the UV sensors to the omicron band, we should be able to isolate their plasma trail a good deal faster. Do you think you could spare a minute just to help me recalibrate them?
TUCKER: I'm afraid this isn't a very good time. (makes a dash for another door, hand over mouth, noises of being sick out of camera shot

Presumably this was in the bathroom as well!

Rom, also mentions in an episode he has to go to waste extraction. At the end of the scene where they first talk about the mines.

^ Call to Arms.

"Waste extraction" is mentioned several times during the run of DS9 actually... Mostly as one of the more undesirable places to work.

Do you ever see cleaner's?