If it takes too lon- to be waaited on. If its too noisey and disruptive. If it appears to be unkept. If prices are waaay too unreasonable.
We did t-is once in Ve-as...everytin on t-e menu started around $100. We weree embarrassed, but we walked out. Bill was mortified, but no way could I see payin t-at for a simple dinner.