I am quite new to Share Point and I've been assigned to manage information sessions through the use of Share Point. Essentially what I have done so far is add a Calendar web part that has allowed me to post events of these info sessions. However, given our limited space, we can accomodate only a certain amount of people (i.e 30). Thus what I'm trying to do is use Share Point to create some kind of registry/counter system that keeps track of how many people have confirmed their attendance to the meeting. I want to be able to give users the ability to click on a button to confirm their attendance and the counter of available spaces to be automatically updated. I'm open to new ideas of facilitating this task so feel free to share. Thanks in advance and I appreciate the support!