Bad parenting?

We were at a friends birthday party and it was of course mostly all adults.  There were kids there, but they all stayed inside the house while the adults played cards and drank, in the garage.  My kids were not there, they had their own things going on.  My kids are a little bit older and so sometimes they will hang out with us.  I over heard a parent asking their kid to go inside with the others because the garage scene was not appropriate for them.  To each is own, but it really got me thinking... Have Danny and I been bad parents all along?  We have always taken our kids places with us.  We rarely ever got babysitters, so the kids have seen their fair share of BBQ's and house parties.  Is this why I am having such a difficult time with the middle one?  Have I sent them the wrong message about how to grow up and the things you should say no to?  I figured that by bringing the kids with us was better than leaving them with a sitter and this was good parenting.  I am definitely second guessing that now.  It is obviously too late to go back and change anything and now i just have to deal with the issues that come with parenting an adult, teen and tween!  THIS folks is why I drink wine!