If you're connecting on in ZRH, there are shower facilities in the LX business lounge (*G) as well. Nothing spectacular as far as lounge showers go, although I've noticed at certain busy times certain they've been "hijacked" and nobody informed that they've been used, leading to some less-than-pristine conditions.
Still not as great as the AC Arrivals Lounge, but far better than, say, DUB, where the idea of "shower facilities" depends on the weather.