There's a piano bar on I-Drive near the Convention Center called Howl at the Moon. It's a chain, so you may be familiar with it. Kind of like Jellyrolls, but more R rated. Even if you are not a drinker, it's a lot of fun and there is no average age of the crowd. During "convention season" it's especially packed with 30, 40, and 50 somethings (not sure how old you are personally). Arrive early for a table, though.