Pretty much everything's been covered. I like bringing enough to share to my club. I pack a bowl then leave the jar/tin on the table for others to smoke if they wish. I bring a handful of blends and a few pipes, just so I have options. The only thing I don't bring is cigars - I buy those at the shop if I decide to smoke one. This is my way of supporting my local b&m. I'll buy tins of pipe tobacco if they have anything I enjoy. I also don't bring drinks. My shop serves all the drinks I enjoy, and they're not overpriced. Again, this is just a small way for me to support and thank my shop for letting us host our club there.
Lastly, I bring anything I don't want. Tins, jarred blends, pipes, etc. Anything I won't smoke or want to get rid of I just tell anybody they can take it. If nobody wants it, the shop will sometimes take it or I just take it back home.
Hope you enjoy your club. It's been one of the greatest things I've ever been a part of. I'm blessed to have a really awesome club and b&m that supports us. Good luck!