Hi, Mudit.
I visited that link, and, yes, it’s using our plugin suite, although its display of the events is highly-customized.
You can view our own demo site at https://wpshindig.com/events/
Our plugin suite really doesn’t have booking type features, but some users, like the one you linked to, do use it as such. For certain use cases, it works just fine.
For such a setup, yes, you’d likely want the two paid products you linked to:
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
I hope this info helps. Let me know if you have any follow-up questions.