There have been a few good threads lately regarding solo travel; seems like there are a decent number of solo traveller on here and then there are those who are nervous to travel alone but want to see the world.
How about a travel group? We could have a thread to organise the group, get ideas, etc. then have a private chat group (not sure where) to organise the trips. Or a thread for people to post their upcoming trips on to see if anyone fancies joining them (doesn't have to be sharing a room, just knowing you have a buddy in the same place) then they can sort it between themselves via pm?