I ticked all days, and the hours 8-12 PM, because I live in France (GMT+1) and am mostly online in the evenings (until late sometimes). I know there are a few regulars that seem to live on the same side of the Atlantic (Joe, eternaloptimist, at least, I'd say).
I also often have a LoL window open on the lobby during weekends (say, 1PM+, GMT). Of course I'm not always right by my PC during the whole time, so anybody greeting me should NOT be angry if I fail to reply