This is difficult to answer without knowing exactly what your preferences are, but here are a few thoughts from a local. Crew Club is definitely “cleaner” and is in a “better” part of town that is easier to access via public transportation. Tuesday night is half priced, and sometimes can draw a decent crowd that night. Weekends can be fun too, but of course there are no guarantees. Crew has lots of private cabins. So, if you want to walk around, pick a guy, then take him back to your cabin, it works well. Many guys walk around in a towel until a connection is made this way. But, crew’s open/public sex spaces are less than ideal. There is a tiny dark room. If you like a steam room option, they do have a nice large one.
Glorious is easier with respect to parking, and is also (generally) much sleazier. For some of us, this makes it “better,” depending on the night. There are a couple of nice dark rooms (great for loads), plenty of glory holes, a “dungeon” area, slings, etc. If you’re into black men, this is a good bet on almost any night. Hummer takes place here on the first and third Saturday nights of the month . It’s gear/leather oriented, but that’s not required per se. Usually very easy to give/take multiple loads on those Saturday nights.
If you’re visiting, and are unfamiliar with the city, you might want to stay at one of the cumdump hotels around Thomas Circle (such as the Washington Plaza) and start with the crew club, which is within easy walking distance. But if you’re looking for an eclectic piggy spot, and feel like venturing out of Northwest DC, give Glorious a shot.