Haven't had a problem with my club. We're usually happy just to add a person that likes to talk about beer as much as us. Don't be afraid to ask all your newbie questions, either. It gives us an opportunity to give you our advice, and may bring up questions we didn't know we had. Plus, if you ask a question that i think I've been doing the right way, the guy next to me may answer it differently, and give me a new look on things. It's all great!
If you're worried about not having anything to bring, bring something "different" like mentioned above. One of the guys that didn't have anything to bring, brought a few sierra nevada torpedo's to share, which were awesome.
One meeting, I brought some homemade rootbeer that I had, and was extremely embarrassed to present it to the guys. It ended up being the hit of the night. The people that showed up late were informed they missed out on the rootbeer!
So, as long as you're prepared to show up and talk beer, I think you'll be alright!
Edited to add: Re-thinking about this, I guess there have been a couple times that have made me think... It's when guys bring their friends to the meeting who just want to drink beer. They have absolutely NO interest in brewing... some have NO interest in the art of beer itself... their only interest was drinking "free" beer. That gets me. -- On the other hand, the guys the bring friends, that show up and pretend they are going to start brewing soon, and are coming to a meeting to see if they like it... those guys seems to sneak by, because we end up doing our best to convince them to start brewing. ;-)