LARGEST SAN FRANCISCO SINGLES PARTY OF 2017! Saturday, May 13, 2017, 8pm-Midnight. Meet new single friends who care about others. The annual Singles Charity Ball at Union Square’s most spectacular hotel always attracts a huge crowd! Over 400 singles attended last year’s Ball. 100% of your tax-deductible donation of $20/advance (by May 12) or $30/door […]