800 Brazos St, Austin, TX 78701

Best to enter the building off 8th Street and walk straight toward the back, ground floor. You'll see the Pleblab flag and the SN sign.

Often there is street parking on 8th in front of the doors or across the street from them (back in angle parking because it's texas). If not there, I find street parking a block or two further west on 8th or on Brazos.

There are also a number of parking garages in the area.