The 55-Hi Drive-In opened somewhere around 1950 and was operated by Jim Olsen, later by Steve Eisner. The drive-in was listed at 500 car capacity with a single screen. No closing date given. It has since been demolished. Located neat the junction of M-55 and old US-127.
I remember attending this drive-in, as it wasnt too far from Gladwin, and one night I drove up to borrow a box of carbons for Meredith and got to see the booth. The hallmark of an Olsen theatre was the generally superb, well-equipped projection booth, and this was no exception. Brenkert, or RCA BX100 heads, RCA 9030 soundheads, but also RCA stereo heads as well.
I recall vacationing in this area about 76 or 77 and poking around the abandoned remains of this Drive-In. It was very close to the interchange for M-55 and US 127, near a cluster of restaurants and related businesses. It looked at that point as if it had been closed for quite some time.