Not currently, but I had two when I was a teen. Molly, a white rat, and Robin, a black hooded rat (pun intended). They actually make wonderful pets!! They're very smart and wonderfully friendly!! Robin use to fall asleep on my chest when I was watching TV!
I also had a friend in NY who had two rats and she did EVERYTHING with her boys! She had leashes for them, they went in her car, they slept with her, she let them run around her yard! Everything!
Yes, you can totally handle them! They like to be cuddled, they'll walk across your shoulders and everything. Just try to get younger ones...if they've spent all they're life in a pet store cage, they won't be as friendly. I mean, I wouldn't be either.
And yes you can take them along with you to your friends! Just make sure you don't lose them while they're exploring new surroundings!
As for care, if not planning on cleaning cages daily, 2-3 times a week is okay. Just make sure they have fresh food and water daily. I would personally go with females 'cuz male rodents smell stronger (musky), no other reason!
Let's us know if you get any! Pictures are always good!!