Halifax Antiquarian Society has lectures approx. fortnightly September to May with some excursions for members in the summer. http://www.halifaxhistory.org.uk/
Greater Elland Historical Society on http://www.gehs.org.uk/ have a programme of winter lectures.
The Friends of Judy Woods group (Norwood Green/Wyke area) is very involved in the heritage of that area. Check their website at: http://www.judywoods.org.uk/
Hebden Bridge Local History Society meets fortnightly from late September to the end of March with a varied lecture programme : http://www.hebdenbridgehistory.org.uk