Find an excuse to hug them, don't wait for girls to hug you! Last week I was visiting my sister's college. I was just talking with her roommate and teasing her a bit. Right before we were about to leave, the girl asked me for my facebook email, as she wanted to keep in touch. I refused unless she gave me a "quality" hug, of which she thought was hilarious. I told her she "failed" on the first attempt and insisted she try again. Next time I told her it was "acceptable" with a big grin. Then and only then did I give her my email.
Girls like guys who are capable of being physically affectionate outside of expecting sex. If you feel good vibes for a girl, find an excuse to get her to hug you. Make sure they "earn" whatever it is you are doing for them with a hug. My free hug count over that weekend was about six or seven. Demand a hug with a huge smile and you can't go wrong. Silly girls, they fall for it every time! :D
well, then make it casual. it all depends on how long you two have been friends. if you have friends for more then 6 months, then it is safe to ask. all you have to do is when you guys seperate, hug her. she will probably smile and hug you back.
Ask for one! Lots of guys I know say "can I have a hug?" or "where's my hug?" it's casual and will get you a hug lol. But it also depends on the girl-some girls just don't do hugging whilst others like it, I just hug everyone all the time but I'm a huggy person but not every girl just gives out hugs to guys.