Axis the nightclub is on Landsdowne Street in Boston, across the street from Fenway Park, and on the same street as Karma, Avalon, the Landsdowne Playhouse, Bill's Bar, and Jillian's. (in fact most of these places are owned by the same company)

Axis has very little in the way of decoration. All the walls are darkly painted, so one can focus on the stage. You can see the stage from almost anywhere inside, making Axis a rather nice venue for concerts. They're open all week, usually to 19+ crowds (which is why masukomi makes fun of Landsdowne Street :)

I have seen several acts play there, including BT, Groove Armada, and the Basement Jaxx.

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some info taken from boston.citysearch.com