Featured Pottery on the Hill Preview Reception Friday, October 28, 6:30 p.m. Tickets: $30/advance, $35/day of. Available at potteryonthehilldc.org   Free Show & Sale + Pottery on Wheels! Truck Saturday, October 29: 10 a.m.-5 p.m. Sunday, October 30: 11 a.m.-4 p.m. Hill Center is located at 921 Pennsylvania Ave. SE.   Thursday, October 27 Washington…