Biff Buzby's Burger Joint - Every Friday night
Hi, y'all! This isn't specifically Miata-related, but for any car aficionados, come on out sometime to the Friday night "Cruisin' Night" at Biff Buzby's (Toepperwein and IH35, behind the Whataburger and Carl's Jr., just off the northbound access road.) It's free, but if you want to park inside the roped-off area, there's a $5 charge (which also gives you a $5 coupon to use at the burger joint.) Plenty of nearby free parking around the event if you just want to walk around and check out the cars, too.
Oh, and I'd be remiss if I didn't mention that this place offers "pickle chips." Not the kind you find in a bag - I'm talking about slices of dill pickles that are battered and deep-fried, served with ranch dipping sauce. Truly a delicacy of epic proportions. The rest of their menu is pretty doggone good, too.
Link to their website: http://www.biffbuzbys.com/events.html
Of course, don't be surprised if you see some fellow Miata owners there showing off, too...