Being seen in uniform is "that guy?"...usually its "that crew." It does look weird for a guy to eat by himself in uniform off-airport but I've had several meals a block or two from the hotel with the whole crew in uniform (mainly because you usually get to the hotel 15 minutes before said restaurant closes)... I can change and not eat (and pay $20 for room service) or run over and eat. If you're that embarassed to wear a uniform you're in the wrong line of work...and will continue to get strange looks from those of us who've flown military for months at a time without seeing a day out of uniform.