I think it is appropriate, but only to close family and friends.
You may certainly bring a gift to a business open house if you want to. Perhaps the new owner is a personal friend. That is absolutely appropriate to do.
You could break an appropriate window, open it and crawl in, or call a locksmith.
Wow where are you located? I do open houses all the time and never charge for them. In fact I pay for the advertising.
Announcements about when Beta Testing is open are posted on the Blizzard forums. There is no point in sending an email to Blizzard prior to any announcements.
I would say that you should at least send out the announcements 2 weeks in advance, so that the people your inviting have time to keep that day open.
It would even be appropriate to attend the service as a gesture of support and sympathy.
December 21, 1967
If you are in the same class it would be redundant. If not, it would be rude to distract from their own graduate. Best would be to announce an Open House either on the day, or the following Saturday, or Sunday, with all your classmates and/or friends invited with their parents.
yes
in the dictionary
grants to open halfway house
Brisbane Open House was created in 2010.