If a player logs into a world named "events" run the command from console: mvtp <player> spawn Thank you. Bump EDIT by Moderator: merged posts, please use the edit button instead of double posting.
I imagine your using Multiverse, correct? You should be able to put a negative node in permissions to deny access to a specific world. Only thing you need to make sure of is that enforceaccess is set to true in the config file.