This is what the average family wore in the 1970’s when going out.
http://findtheglasspenny.files.wordpress.com/2011/07/bradybunchdisco.jpg
Not in my part of Texas. Dressing like that might get your ass kicked. :)
Probably the most accurate representation of the mid 70's comes from the movie "Dazed and Confused". When I watched that I thought I had reached a time warp.