seth does manage them. they sell out every show they do, both here in dc and elsewhere.
now, 4 nights in a row is a bit ambitious, but those shows are legendary and easily stretch to 2.5 hours of sweaty, dancing, madness with a crowd that is there to have fun.
i went to 2 out of 3 of the shows last summer and they are amongst some of the best concert experiences i've ever had. so, i've got tickets to all 4 nights next month. not sure that all 4 will sell out entirely, but at least 2 of them will and i'm sure the other 2 will be close to capacity.
if you haven't seen them before, i encourage you go check them out. they cram at least 10 musicians and singers on stage, do long sets, feed off the audience energy, and will guarantee you a good time. just wear a tshirt and shorts and hydrate yourself because its about 95 degrees in there with all those dancing bodies.
i've taken non followers of their music to their shows in the past and they have been truely impressed.