here. Pick and choose.
I particulary like
Join the XXX team as they celebrate the opening of their new showroom. Time, place.In your case, perhaps something like this:
XXX Co. Opening Reception. One and all are invited to toast the opening of the company's new showroom. Time, place.
One and all are invited to join our Marketing Manager XXX YYY and the rest of the ZZZ team, as we celebrate the opening of our new showroom. Date, Time, place.
Student or Learner