According the the SRV Gig database, Stevie Ray Vaughn played only one show at the Chance theater in Poughkeepsie, on April 28, 1984.
Now, I had a very good time during the early 80s, but I did remember seeing SRV twice at the Chance. So I checked my scrapbook and I have a ticket stub for Stevie Ray Vaughn and Double Trouble at the Chance, on Tuesday, July 12. July 12 fell on a Tuesday in 1983.
I also saw SRV at the New Paltz College Springfest concert in 1984 and at the Orpheum Theater in Boston in 1986.