Maurine,
I noticed you didnt have any responses so I thought I would answer!
Basically there is not a lot of difference between the two meetings. In our area ALL meetings are designed to last 30 minutes. The AT WORK is convenient for many who enjoy a meeting in their workplace. They often eat lunch during the meeting ( after weighing of course!

) Many co-workers enjoy the "challenge" of being WW members together!
I have led both type of meetings and the same info is usually given at both types!
So my answer would be.....join where it is most convenient and comfortable for YOU!
Hope this helps!
Cin