Perhaps it's partly that I can't stand bars. (Noisy, smelly, crowded....) I could easily imagine meeting someone interesting in a bookstore, talking for a few hours, & exchanging contact info to possibly meet up again later, or meeting while pursuing a mutually-enjoyed hobby (in fact, I met my husband that way). Perhaps that's partially the same sort of thing, just a different category of venue. But no matter where I've met someone, I just can't imagine launching into a romantic or physical relationship with someone I've only just met.
But sure, it takes all kinds to make a world, I agree.