Dallas: Kellers on Fri & Sat night. Sat nights there's a $5 parking 'fee' but the burgers are good & the beer is ice cold.
Rowlett: Sammy Walkers BBQ (Dalrock & HWY66) on Thurs nights from about 6:30 until dark. Smaller crowd.
Also, Sonic ususally has a cruise night once a month (Sat night) in Plano.
Some of us just hang out in the driveway
.