Sentence:  The baths were mostly tiled showers, with an endless variety of spouting mechanisms, but with one definitely non-<WSD>Laodicean</WSD> characteristic in common, a propensity, while in use, to turn instantly beastly hot or blindingly cold upon you, depending on whether your neighbor turned on his cold or his hot to deprive you of a necessary complement in the shower you had so carefully blended. 
Meaning of the word marked with <WSD> tags:  lukewarm, neither hot nor cold (with reference to Revelation 3:16)