Located underneath Butler, Studio 34 is a great spot for a variety of things. There's a lounge with a pool table, puzzles, card games, board games, spaces to do work, couches, and much more. If you need a quick and easy spot to get some work done or just want a good third-space to hang out, Studio's a great choice. Studio is also the only place on campus open for food late at night, which comes in clutch during the week, and is an interesting place to be Friday and Saturday nights!
Since you're already in Butler, it might not be the worst idea to head up to Chris and Junny's room for a bit, just to see what's going on.
If you're feeling a little more productive, then you could catch a bus and ride over to Equad and finally go to office hours.
Or, if you're feeling in between and maybe just want to take a stroll, you could peruse around the Art Museum.