Our group is pretty casual as well. But we are trying to get faster and more competitive. Most of us have a bag with all our models in it so we can play any point level at any time. No challenges that I know of, would be fun though. We see people standing around looking lost and we ask them if they want a game, if they accept then we find a point level to play at, pull out a list and throw dice. Most people play at the 50 point level, but like I said most of s play multipla factions so we can play from 15 points all the way up to 100 points +. As far as tables go, we have the majority of tables which is 7 full length tables playing WarmaHordes each Wed night starting at about 5 and going till the store closes.