If you’ve seen the Foo Fighters live, you know that they always give 110%. Whether you like them or not, it’s not out of the realm of impossibility that they’ll play for 2 1/2 hours every night, with not just deep cuts from their extensive catalog, but also some covers. Their Lollapalooza after-party at the Metro in Chicago was no exception, as it found them joined by Lolla co-founder Perry Farrell to play Jane’s Addiction’s “Mountain Song.”