Story Book Time at the Library

I discovered recently that the local libraries have story book time and other activities scheduled by age groups. I figured it would be great for Emery since she loves books and another bonus is that it's free entertainment. The class for 0-2 1/2 year olds starts at 10:15a which is a little early for Emery, but I really wanted to try it out.

So, she finally woke up this morning at 9:30a and I got us both ready and out of the house in 30 minutes -yay! We got to story time and Emery was a little shy at first. After 5 minutes she was walking around saying hi to all of the other kids and parents. The rest of the kids in the room were probably less than 12 months old. They all (except for Emery and one other girl, 17 months old) sat quietly and nicely in the parents laps for the whole 30 minutes. Not Emery! She walked around and talked, waved and laughed with everyone in the room. I figure this is normal behavior for a 15 month old baby who is walking, right? I'm just not sure if we were "those people" who disrupted story time. I want to go back, but I'm not sure if I should wait until Emery will sit quietly in my lap for 30 minutes, which I know that will be NEVER. Thoughts?