Combine salt and chile powder in a shallow dish. Rub a lime wedge around the rim of a tall glass and then press the rim into the salt-chile mixture to coat.
Fill glass 2/3 full with ice and then add lime juice and mango juice. Add in a few drops of hot sauce if desired and stir to combine. Top with beer and serve remaining beer on the side (you may have extra beer, but you can continue adding to your glass as you drink it down).