If you want "safe" chains, take Bart one stop to the San Bruno stop, which gets you to the Tanforan mall.

I 2nd HK Flower Lounge, though. Also, Peter's Cafe for a good diner, at the Millbrae stop.

Really, lots of places within one Bart stop. That said, Lyft/UberX would probably be cheaper than a Bart ticket for that short of a trip.