During my first masters, I had housemates. I was an international student (American in Canada) and lived in a grad house owned by the university. Everyone else was a grad student too, most in demanding PhD programs, and it worked out really well. It wasn't exactly like a "roommate" situation because it was a large house (3 stories) and we each had our own room (considered an "apartment" by the university.) Since everyone else was a serious student, getting work done wasn't a problem (plus we were on the outskirts of campus, so close to the library.)
Since I was in a totally new place, I actually way preferred that set-up... it was just easier to go with this set-up through the graduate student housing office, but in retrospect, getting my own apartment in a strange city in which I didn't know a single person would have been a bit lonely (and I say that as someone who values alone time and privacy.)
That said, when I was just working and had roommates in another city, it didn't seem all that conducive to studying. But, that was because we were all working and had our nights and weekends free. So... roommates/housemates are fine IF you're all on the same page and preferably have a similar goal and lifestyle. And, school is expensive enough, so if you can save money through shared housing (especially important in expensive cities) you should seriously think about doing so.
I know my last masters was not an OT masters, but I really have to impress upon people that despite the rigors of grad school, you WILL have time to socialize. Everyone talks as if people aren't studying enough if they have time to socialize, but that's not true. You'll bond with your classmates over the work (and especially shared work) but equally, will blow off steam with them. Everybody in every program has times in which they just have to lock themselves in their rooms and work non-stop, but mostly, we were able to hang out for a bit in the evening, or on the weekends, and welcomed that relief.
I was in my late 20s (turned 30 towards the end) while in that program. Now I'm 35 and married, but if I were not married and were moving for school, I would still probably live with housemates. We had two guys in their late 30s in my house and it seemed normal.
