The San Francisco Symphony welcomes its 99th season at tonight’s Opening Night Gala.Glammed-out guests will promenade through the lush glow of Davies Hall’s opulent lobbies and then treat their ears to the sounds of incomparable soprano Jessye Norman.After the concert, there is the difficult choice of which afterparty to attend. But both have cocktails, dancing, snacks, and entertainment, so you really can't go wrong either way.  Tickets range from $140 - $265, but the requisite sparkling wine is complimentary.What makes the gala event more impressive is knowing that all proceeds go to SF Symphony education programs, which provide 75,000 Bay Area kids with music education.