I wouldn’t say Hopkins is in that great an area. Baltimore is a great city, but as mentioned above, just like with any city, you need a real awareness of what parts you should avoid. If you go, learn from the older students where to avoid. As far as variety of things to do, Orioles games are very affordable (not so much the Ravens). You’ll find college lacrosse to be HUGE. There are plenty of fun areas of Baltimore - Inner Harbor has great shops and restaurants, street entertainers, paddle boats, and more. Fells Point has quaint old houses, neat shops and restaurants. Hampden has cool vintage shops and bookstores.
There’s theater - including Broadway shows, there’s the symphony, museums, and more. D attends college in Baltimore and has thoroughly enjoyed exploring all the city has to offer. It’s also a quick trip by light rail to get to DC, and New York and Philadelphia make great weekend trips. Baltimore has been a wonderful “extra” as part of the college experience.