In a neighborhood full of iconic venues, Green Mill Cocktail Lounge remains the crown jewel. The jazz institution, originally opened in 1907, was once frequented by the likes of Al Capone and his gangster squad during the Prohibition era (you can still spot Capone's preferred booth, conveniently placed within eyeshot of both the front and back exits, inside the joint). Decades later, in the '80s, current owner Dave Jemilo revamped the club to include a music-focused roster of bebop, free jazz and slam poetry nights; in normal times, the space is packed to the gills with spectators sipping martinis and listening intently. The Green Mill isn't hosting live music shows for now, but in the meantime, you can still visit the bar's new sidewalk patio for drinks and bites from nearby restaurant Fiesta Mexicana.