As well as the more casual drop in that occurs on irc. Maybe weekly meetings at a set time that's most beneficial to the community. when there's most members available.
OK. I’ll be a bit more precise. The Best Day for me is Friday after 19.00 gmt. Second best Monday after 18.00. I can do most week work days. I tend to work on the weekends so although I can often do them they are the worst for me. Sundays are better than Saturdays.