Am looking forward to treating myself to a solo lunch a few days after my birthday. It will be a weekday, and I'm looking for something delicious but not necessarily wallet-busting, and where I won't stick out like a sore thumb eating alone. I don't mind sitting at a bar. All food types are welcome, free parking would be especially welcome. Lastly, I'd like to stay within the Boston/Cambridge/Brookline area. Thanks for your ideas!