Hey, I've got a $10 Holga lens for my mirrorless setup. It was $10 (cheapest lens I own by a large margin), it takes fun pictures at parties, and it was ten dollars. I've been tempted to get a lomo or holga cheap film body for awhile now... Just because it is amusing, and exponentially cheaper than some of the other film cameras I want "for fun" (an old Leica, or Voigtlander Bessa). I say "fun", because I have a full DSLR kit, and a full mirrorless kit, both of these fulfill all my serious and professional needs. Holga and Lomos are for playing around with, and for taking photography back to its simplest principles. They fill the same roll as, and I hate to say this, Instagram.
There are still film labs floating around. Most towns with a college probably have some. Also, and I might be wrong, but I think the Lomography guys will develop film for you. You can ship it out of course, or drop it off at most Costcos or Walgreens. I'm not sure if those last two hold for 120, though.
I actually have a good deal of respect for Lomography, they've been working on keeping film stock alive, which benefits more than just them, or the mythical "hipsters".