Growing, buying and smoking cannabis legally inside a Michigan business was an alien concept during marijuana’s decades of prohibition. But it’s happening today in Kalamazoo, and everyone 21 and older is welcome. A cannabis consumption lounge has opened in Kalamazoo — only the third in Michigan to open. The business is called Only Alien Cannabis Co., which opened earlier this month at 4525 West KL Ave. It’s similar to a bar, but with marijuana instead of alcohol.