Friday happy hour at Battery Park Book Exchange hits different when there's live music. Hank and Vollie at 5:30 means you can catch a set with a glass of champagne before dinner plans kick in. The door policy gets a little stricter on weekends, some nights lean 21-and-over only from Friday through Sunday, so if you're bringing younger folks, Thursday might be your safer bet. The space sprawls across two floors of leather chairs and couches inside the Grove Arcade, so even when it fills up there's usually a corner to claim if you show up early enough.