Too bad wiki didnt have the Warfield capacity or else you would be champ. But it doesnt, oooops. But then again if you Google you get various answers, BUT, the most consistent answer is over 2000 but more around my answer if anyone ever asked me how big the venue was which is about 2300 when set up for GA floor with reserved seating upstairs. You know that balcony in the Warfield holds as many as the Fillmore does in its entirety? Those nights are very ''unpopular'' to the over 35 crowd I am sure, lucky I dont fall in that range.