Bar & Beverage Services for Weddings in Knoxville! Urban Proof is a bar and beverage service in Knoxville, TN, that creates top-notch drinks and an unmatched experience for weddings and special occasions. The business employs a team of expert bartenders who serve an array of refreshing sips, from signature cocktails and beers to non-alcoholic drinks and wines. Rest assured, you and your guests will experience a seamless celebration with the Urban Proof team on your long-awaited day!