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Additionally, expatriate Lao men who go back to Laos in search for a wife are accepted and it seems to happen more often than you would think.
If you’re meeting the family for the first time, be very respectful of the parents.
If staff or owners are close to the family or to the ethnic community, then they may prefer to go to another restaurant altogether, if the intent is to keep the date a bit of a secret (at least from the parents for a while). I’ve always believed that no matter how westernized a Lao person might be (this applies more to the Lao expats living abroad but it can apply to those living in Laos too) that really at the core they are quite conservatively Lao on the inside.