Listen to Milwaukee radio stations. Kiss FM, The Lake and The Mix often give away movie premiere or sneak peek passes. You usually have to call in and answer a question or be the 10th caller to win the tickets. Sometimes they ask you to sign up for their online club and turn in points (that you receive for logging in) to win the tickets.
Shop locally and get premiere tickets. Sometimes car dealerships or distributors for businesses offer tickets to patrons. For example, if you buy a new car, you may get two tickets for the new Harry Potter film on opening night. Distributors like Miller may give grocery stores sets of premiere tickets to give out as prizes for customers who enter contests as well. You must stay alert and just watch for these specials advertised on TV, radio or online.
Sign up for email lists for smaller theaters. The Oriental, Times and Downer theaters are just a few smaller venues in Milwaukee that offer email lists with perks for members. Here they will advertise any contests or sign-up opportunities to get your hands on premiere movie passes.
Purchase tickets online. All theaters in the Milwaukee area offer online ticket purchases. This means you can reserve your ticket head of time instead of waiting in line and possibly not getting tickets. You need a credit card to make such a purchase, but you can choose to print your tickets at home or at a kiosk at the theater. Visit the theater's website to purchase the tickets.