Maybe not quite the place for a romantic weekend away, but included here for the sake of completeness, there is always the
Leoneck Hotel in Zurich, aka the Cow Hotel.
At the very least, it would give you the chance to make some exceptionally poor jokes.
* Like suggesting a couple's moo-ssage. Or going down to reception and asking how to work the heating...because "I'm Friesian."
I realise that the steaks are always high when planning a weekend like this. You'd be udderly foolish not to consider all your options.
I could continue this all day, but I'd butter not. I'm milking it enough as it is. I'll stop now before I get in trouble with a moo-derator.
* while this sounds like the ideal way to spend a weekend to me, it may not appeal to everyone. My wife, for example.