Each of the sims I visited had corresponding websites. The Elf Circle and Tombstone websites provided details and included an event calendar. The ROMA website provided details but I did not find an event calendar.
Tombstone provided free outfits. To join a role-play group in Tombstone, you were required to purchase a HUD titler. I would have liked to participate in their event and was disappointed about the purchase requirement. The Elf Circle group did not require a purchase, however, I did not see an area offering free outfits. One thing of note about the Elf Circle sim, it includes an area with self-guided building tutorials.
Here are some photos from my visits. Enjoy!!