Bay seniors are you disinclined to join the hipsters hanging around grubby street corners eating from food trucks? Then you are cordially invited to Twilight at the Presidio where you can graze on tapas in your own lamp-lit cabana or lounge next to a warming firepit. Cocktail servers roam around helpfully. It happens every Thursday though June 26 on the Presidio Main Lawn from 5 to 9. No entry fee.