<human>: Backstory:  I recently moved in with my brother and his wife (I will just call them "Jan" Jessica + Dan).  While they were away at work a neighbor knocked on the door and I answered it.  They said they were having a BBQ to celebrate a graduation and they wanted to invite Jan for this saturday at 3 (~2 hours from now). I told them they are working odd schedules and didn't know if they could make it but i would let them know.  So they never explicitly invited me but Jan thinks I should go since it's literally their next door neighbor and I will be living here for a while.

I was thinking if didn't stay too long then and i brought a gift i could just show up meet some people and have an OK time without feeling too awkward about it.

Do you guys think this would work?  I want to meet new people in this area and i think this is a good way to do that, but since i was never explicitly invited I don't want to feel like i'm intruding.  I know how costly it is to host a BBQ with a lot of people but maybe since i'm bringing a gift they wont mind?

I know there will be kids there so i don't know if i should bring some soda or beer too maybe? (I think its customary to bring your own drinks to BBQ's right?)

Also worth noting I've crashed parties before and I know the general rule is to just pretend like you belong but I really dont want to make a bad first impression on people i will have to live next to.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Room mates got invited to a party through me. Is it ok to go without them? What, if anything should i bring?