The oldtime slow jam will take place every second and fourth Sunday @ Brooklyn Rod & Gun Club. The jam will have three leaders on banjo, guitar and fiddle who will be there from 6-8:30pm.  Promptly at 7:30 we'll take a break where you can get drinks and mingle.  We'll start up again and continue till 8:30.  There usually isn't food, although the grill sometimes is out during the summertime. Brooklyn R & G club is located in Williamsburg, Brooklyn on 59 Kent ave. (N10th and Kent) in the bustling …