IMO, i think it's ok to "hang out", but I don't think it's a good idea to hang out at 12:30am it might send a wrong signal but that's just me.
But let me tell you my POV in dating while separated, I think it's ok if there's no separation agreement. Dating to me doesn't mean it's serious R, you know just going out, having fun...I think if it's mutual understanding with the other person to just hang out I think it's fine.
Newman
me40; W43 M18; T~20 D18; S13 & S3 bomb 5/9/11 EA busted 4/30/12; 9/4/12; 4/29/13; 6/10/13 same OM
Separated 4/1/14
"Even a flicker of light will shine through darkness-12/25/2012"....better days ahead.