Virtual reality can help realize mediated social experiences where distance disappears and we interact as richly with those around the world as we do with those in the same room. The design of social virtual experiences presents a challenge for remotely located users with room-scale setups like those afforded by recent commodity virtual reality devices. Since users inhabit different physical spaces that may not be the same size, a mapping to a shared virtual space is needed for creating experiences that allow everyone to use real walking for locomotion. We designed three mapping techniques that enable users from diverse room-scale setups to interact together in virtual reality. Results from our user study (N = 26) show that our mapping techniques positively influence the perceived degree of togetherness and copresence while the size of each user's tracked space influences individual presence.