All Xareon said was "senior highschool dance". Are you talking about the Prom?
If so, I don't think you guys should miss it. Prom is one of those social events where anything can happen, and it's at least the one thing in her life that she can look back on and say she did. If she wants to go, put on your best tux and behaviour and take the girl out for a good time. Find a nice restaurant, take some pictures. It's something you want to look back on later in life. I still remember all the stuff I did at my Prom, and that was many many years ago
And as far as other places to go dancing, a lot of that depends on where you live. There are all kinds of social functions/clubs/bars where you can dance, it just depends on your area and what kind of an atmosphere you are looking for.
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