Swamped

Your goal is to get to the hostel, so your best bet is to help out the side defending it.

Of course, that's also the side that doesn't have reinforcements coming. Which means you want to figure out if that's the right choice real fast, because their best bet is to deal with the other group before the reinforcements arrive.

You rush over towards the doors. They'll probably take you for a threat, so you need to talk real smooth, and real fast.

"Seize that man in purple!" the group's leader shouts. You raise your arms promptly, as two people approach and point quarterstaffs at you.

"Wait! I'm here to help! We have a common enemy here!"

The leader looks at you skeptically.

"With that mask on, you could be on any side. There's a lot going on tonight and we don't have time to deal with unknowns. If you're really not with our enemy, the most helpful thing you can do is get out of here and leave us to it."

Well. As threats go, that's not a particularly hostile one. You might be able to persuade him to let you stick around if you can make a more concrete offer. Then again, it might be better to just take him at face value, back off, and try something else.

Best make up your mind quickly.