Variety, as they say, is the spice of life. So it’s something to both celebrate and ruminate upon, that on Tuesday night I was reviewing a gig at which the guitar was undisputed king, whereas last night I was standing before an 11-piece band that didn’t include a single guitar. But the Romanian big band Mahala Rai Banda produce such a brassily dense sound that it’s hard to imagine even the most cranked-up Strat being able to get a chord in edgeways.