Odds are you've already heard about the Troubadour, but that doesn't mean you shouldn't try to catch a show there. After all, this WeHo venue — which opened its doors in 1957 — has played host to a virtual who's who of the music world in the years since, serving as the spot for many a live album, memorable debut, or noteworthy anecdote — like John Lennon getting kicked out for heckling the Smothers Brothers. Just be sure to keep an eye on their calendar — while many shows sell out well in advance, the place is very well-booked, so there should be a show happening soon for you to slide your way into.