Hop on your Nimbus 2000 and head downtown this Saturday as Potterheads convene in Minneapolis for a night of spellcasting, costume contests, and magical drinks. Wear your house colors and grab your wand, as those who get into the costumed spirit of the crawl will score drink specials and free admission during festivities. Bars welcoming witches and wizards include the Loon, the Pourhouse, and Brothers Bar & Grill Minneapolis. At each location, revelers will find a variety of special drink items, reasonably priced from $3 to $7. That includes familiar wizard-world concoctions like Firewhiskey, Polyjuice Potion, Butterbeer, Gillyweed shots, and Felix Felicis, a delicious-sounding champagne cocktail made with simple syrup, lemon juice, and ginger beer (find it at Kieran’s Irish Pub). The aptly named Potter’s Pasties food truck will be offering eats throughout the night, and folks will gather for a group photo at the 508 Bar at midnight. Cash and book donations collected during the event will benefit Friends of Hennepin County Library. Find more info at www.facebook.com/events/303188900131732.