THE STREET - May 12 - Matchmakers are optimistic that Facebook won't be able to replace their key advantage: face-to-face meetings. "There really is a magic meeting face to face and that's why businesses like mine have survived even with the growth of the Internet," said Michael Karlan, president of Professionals in the City, a speed dating events provider. "It will positively impact upscale matchmaking businesses because people will want personal service even if it costs more," argued Michelle Jacoby, a matchmaker in the Washington D.C. area. Jacoby has run her own company, DC Matchmaking, for nine years. She usually takes 20 clients at a time, and matches clients to 6k-7K Washingtonian singles who joined her database for free.