Research help needed for field guide to single men

I’m trying to write a light-hearted field guide to single men — and your mind is certainly sharper than mine right now.
Single dads, chime in, too!
What kind of single guys do you meet at the Trader Joe’s versus at Safeway?
Over here, the guys at Trader Joe’s are often sharp-looking, fit, polite, and focused. At Safeway, [...]