On a recent Saturday night, three galleries along Central and Harrison avenues were open — Synthetica-m and the collectively run U-turn Art Space and Semantics. The exhibits at U-turn and Semantics were amazingly good. Their shows are still up through May 28. And yet word comes U-turn will be closing after one more show. So yet another Cincinnati alternative space that has made a mark will be gone before it can really galvanize growth in the larger arts community.