Not for stoners, this marijuana conference in Detroit is all about joining a growing industry

Once shunned by business people and outlawed by public officials, the marijuana industry is fast gaining respectability — and investors.

At a gathering of marijuana supporters scheduled for Sunday in Detroit, there will be no rappers, no “medicating tent,” no vendors pitching ornate hash pipes at stoners in T-shirts, all standard features at most marijuana events.

Instead, more than 150 attendees will have shelled out $200 apiece to learn how they can break into what the state Senate Budget Office says is destined to be a $700-million industry in Michigan, conference organizer Rick Thompson of Flint said.

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