Today was the Open House at my masjid, and alhamdulillah it was a beautiful success. Youth volunteers conducted tours, trained da'wah volunteers hosted booths to answer questions about Islam, and an amazing exhibit was available describing the roots of Islam in America. There was also a main presentation that I did not attend (as I was manning a booth) but which attendees seemed to appreciate.
One interesting observation I made was that there was not, as one might expect on a hot summer day, very many guests wearing wildly inappropriate clothing. A while ago I wrote a brief article with some FAQs about visiting a mosque--one guest even recognized my name from the article (which has been posted on the Islamic Center's website.) Many ladies even brought a scarf though that certainly wasn't necessary, and while a few people did dress very casually, I was impressed to see so many people who took seriously the fact that the mosque is a place of worship, and who dressed accordingly (despite the heat!)