I asked my in-laws for permission, only because they had told me they were upset with their son-in-law who didn't ask. I think it's outdated and lame, but whatever, they didn't and that's what matters. Anyway, ask them right away. I was going to wait until after we had ordered dinner, but my mother-in-law is blunt and such and asked right away why I was taking them out for dinner. She knew what was up. She also ordered the pork chop special, which was great because I couldn't really afford to take them out for dinner to begin with (which I think they also knew).