Well it depends on how you define 'light' RP. I can point you in the direction of the Militia who meet up every Thursday night at around 7:30 and spend a few hours missioning in character. Our in character thread is on these boards if you want to get a feel for what we're like.
Oh, and I forget, we're heroes and on the Union server.
Hope to see you around. 
@Dante EU - Union Roleplayer and Altisis Victim
The Militia: Union RP Supergroup - www.themilitia.org.uk
Dove's mad monday xp dash delivered.
For other nights maybe the Egyptian goddess would like to team up with a worshipper and his lady friend for some Nemesis / Crey / Council / Thorns bashing. Good, wholesome family fun for the entire congregation.
Patriot Brigade on CoH or Bismarck Axis on CoV defiant server got some good RP going, small group but those members are always up for some good RP.
Always looking for good RP members to join. No set nights for the group unless a story arc has been specified and a meeting has been arranged, but if you online and ever fancy some RP based meet-ups or missions we just get stuck in.
Any teams going right now with mostly mission focus but spiced with light RP as well? Union, defiant, hero or villain? I'd like to do something.