With so many museums in D.C., it's easy to overlook the wealth of fun and interesting events that are happening at them. Here's a round-up of some of the notable events and exhibits going on in July, including a look at baseball in D.C., a hip-hop happy hour and a chance to finally see what's living in your refrigerator. >> As we noted last week, the Smithsonian Folklife Festival is running through July 6; this......