We go to Vegas for a week every year and a weekend or two. However, we don't usually have 3 other couples with us. These are friends that we've partied with since we were in our 20's. We'd like to find a place to party and dance that isn't a 'club' type place, long lines, etc. Good music, 70's, 80's.... Any suggestions? We're staying at MGM so somewhere in that vacinity would be ideal.