Our job is to bring Judaism down to the lowest levels that we can to make a dira lo yisbareich b'tachtonim.
The A"R says we can't do that for klipah gamor, but klipas nogah is fair game.
If bringing Judaism to a basketball game, something that is klipas nogah, and reaching Jews via that manner will perhaps convince 1 more Jew at the game to light a menorah that can tip the scales, so be it.