Other dances of interest
The Norwich contras are 2nd Saturday and 4th Saturdays. The last dance in June, and dances on those days in July and August are held instead at the Pavilion in East Thetford. If that isn't enough to satisfy you, here are some other options:
Montpelier, VT, has a contra dance on the 1st, 3rd, and 5th Saturday each month. A new series (2015) on the 2nd Saturday features contras with another form of dance each month.
Brattleboro, VT, has a contra dance twice a month on Sunday evenings, usually the 2nd and 4th.
Nelson, NH, has a contra dance each Monday night. Nelson is a famous venue in dance history,
sometimes referred to as the contra dance capital of the universe. Read more about it here or view Mary Wesley's fine documentary, produced in 2013.
Looking for dances farther afield?
The Dance Gypsy is an excellent site for one-stop searching in New England and beyond.