"content" and asp.net aren't specific enough to answer this question as is.
Are you looking to sell a product? Need more details of the end goal and what value is being offered.
1) Look through posts and just and tally which "side-topics" show up the most within the last week. Rank them. The top two side-topics for each group will be the most promising ones to suggest to that group in the future. You'll basically be making a 'word cloud', like this: https://www.jasondavi...
There's a couple things to take into consideration. Do you want to host the software yourself? If not, look into ticketing solutions like EventBrite or similar. If you're willing to host it, there's a ton of really good solutions available as plugins for WordPress. I work for Modern Tribe, and ...
Im a client whos working for Hotforex they are very good