Depends on the GTG, hosts, location, etc.
Play with your saws; try other guys's saws; do demonstrations; race; check out others' shops and saws; swap/trade/sell stuff; cut firewood for members or charitable uses; connect live faces to on-line names; learn stuff; BS; socialize; blow up cheap saws; eat; etc., etc., etc.
They are great things to attend/participate in, and a great way to connect with others.
Philbert