A new gymnasium for a sports club was designed taking acoustic confort into consideration, in order to accomodate sports practice, sports events with the public, or musical and drama presentations, taking advatage of its large capacity for the public and performers. The floor plan included room enough for a basketball court with public space on one side, where grades for about 200 people will be permanently installed. Walls were treated in a way that is useful for the sports practice (hard surfaces), with hidden absorption material to reduce the usual reverberant field inside the court, and to allow for sound events with only the addition of a mat (to protect the floor woodwork) and extra grades and the sound reinforcement system.