GVOC has been running a mid-week training session, called the WET series, for almost 10 years now. This has been a key factor for growing the club from 100 members to almost 700 for 2012. This dependable schedule, week in and week out, really helps build an active club.
1.
Maps are (almost) all city parks that are relatively close to everyone (we don't have much of any forest terrain close to the city anyway). We now have about 40 different maps, which is enough to support the 50 sessions per year without getting too repetitive. The city parks are great for beginners.
2. Simple organization. Usually just a single course and pin flags for controls. Pin flags have reflective tape for the winter time. Manual timing. No permissions. The week's organizers puts on whatever they feel like, can be normal point-to-point, score-O, handicap box, memory-O, one-man relays etc etc.
3. Cheap to participate (free with membership, which is $10 per year). We subsidize the WET series with the income from our 10 WhyJustRuns and other A-meets.
4. Social. Those who want go to a pub or pizza for dinner after.
5. WETs are a great way to start to train new officials. It's not as intimidating to put on a single course with pin flags as a B-meet or A-meet.