Mark Bisnow

Based on the limited information available, here's what I can say about Mark Bisnow:

Mark Bisnow is an American entrepreneur and former political aide who founded Bisnow Media, a commercial real estate news and events company.1 His LinkedIn profile lists his current position as "Sandy Beach" and location as Miami.2

Some key points about Mark Bisnow:

• Born in August 19521
• Founder of Bisnow Media in 2005, which grew to operate in 29 cities and was sold for $50 million in 20161
• Former press secretary for John B. Anderson's 1980 presidential campaign1
• Author of two books on American politics1
• Has a BA and MA from Stanford University and a JD from Harvard Law School1

The "Miami Walker Talker" and "Sandy Beach" titles on his LinkedIn profile appear to be informal or humorous descriptions rather than official job titles. Given his background in media and events, these may refer to networking or speaking activities he engages in during retirement in Miami.

However, without more context, I can't say definitively what these titles mean or what specific activities he's currently involved in. The LinkedIn information suggests he may be semi-retired or engaged in more casual professional activities in Miami.