Proof Pizza is a pizza restaurant in Milwaukee’s North Avenue corridor, holding a 4.1-star rating across 218 Google reviews. The atmosphere is relaxed and unpretentious, the kind of place where you can settle in without feeling rushed. Live music features regularly on evenings and weekends. Outdoor seating is available for warmer months. The restaurant is welcoming to families and younger diners. The menu includes vegetarian options. Prices are in the $ range.