We ask you not to do this, as you will encounter many problems. Especially if they are meetings where, for example, a table is reserved in a restaurant. This is because reservations are usually made for the number of people registered at the meeting - so you would not get a seat at the table. If you are not in the meeting, you do not have access to the group chat and therefore do not know what exactly has been arranged. So it can happen that another meeting place is chosen or the time of the meeting changes at short notice - then it is of course annoying to go somewhere where it does not take place in the end! And last but not least, put yourself in the position of the meeting organiser. You wouldn't be thrilled either if someone turned up unannounced at a meeting you weren't expecting!
If you see a meeting you would like to attend, you can favourite it (tap on the star in the meeting), and you will be notified when a place becomes available in the meeting. You can also create your own meeting and even use the desired meeting as a template. To do this, go to "More" in the meeting and tap on "Use meeting as template".