There are two people in the guild hall currently. Two people, including you, have yet to enter. If you only consider those as an option, you have four different people to approach.
However, I doubt others are against being joined. I mean, one group is entertaining at a party, which Victoria would fit in just fine. (Though from her CS would likely hate with a passion.) Another pair is off to kill an ox, and my character is with Calla- going to level some farm land.
Lots of options. Entering the guild is the easiest, but there is plenty of opportunity to join any of the other groups as well.