Most groups I've been a part of have had snacks or a potluck meal at least periodically. A lot depends on the time of the meeting as to what fits best. Also are most of the members involved in lots of other things (like kids sports or other activities plus a full time job) or do they have plenty of time to come up with something to bring.
Many times I'd run by the grocery store on the way to whatever meeting it was and grab a bag of salad or pack of cookies or go thru the drive thru at the chicken place and grab a family bucket and hope I was going to get there before everyone got thru the serving line. Seemed like the meeting scheduling was often focused on getting everybody home before whatever TV program came on and didn't take into account the fact that some of us had more going on than just that one meeting and watching TV! Will get off my soapbox now...LOL!