I'm instructing again this season with COM Sports Car Club,
http://www.comscc.org/
COM runs great, unique events; HPDE on day 1 and Time Trials on day 2. The instruction is excellent and you get 80+ minutes of track time on day 1, and 50+ mins of practice on day 2, plus the time trial, and usually some open track afterwards. Registration for NHMS 1 is open for April 4 and April 5, as well as Watkins Glen on April 20 and 21.
April 4 & 5
Saturday-Sunday NHMS
April 20 & 21
Monday-Tuesday Watkins Glen
June 8 & 9
Monday-Tuesday Mont Tremblant
July 7 & 8
Tuesday-Wednesday NHMS
August 1 & 2
Saturday-Sunday NHMS
September 23 & 24
Wednesday-Thursday NHMS
October 31 & November 1
Saturday-Sunday NHMS
There are a wide variety of cars that run the events; BMWs, Porsches, Lotus', Ariel, Cobras, open wheeled cars, Miatas, Subarus, etc, and the folks who attend are very down to earth.