Conversation so far:
What business was Gavin Newsom involved in?
Newsom and his investors created the company PlumpJack Associates L.P.
What did the PlumpJack winery do?
PlumpJack Winery produces primarily super premium Cabernet Sauvignon and Chardonnay varietal wines from Napa Valley grapes.
Was the PlumpJack winery successful?
The business grew to an enterprise with more than 700 employees.
Was Gavin Newsom involved in other businesses besides the Plumpjack winery?
The PlumpJack Cafe Partners L.P.
Did the PlumpJack Cafe  do well?
Are there any other interesting aspects about the Gavin Newsom article?
The PlumpJack Group grew to manage 23 businesses, including wineries, restaurants, and hotels.
Please name one of Gavin Newsom businesses?
Newsom and his investors opened the Balboa Café Bar and Grill.

Question: How was he involved in those businesses?
Self-contained rewrite: How was Gavin Newsom involved in the PlumJack Winery and the PlumpJack Cafe businesses?