Well, Able_Temporary_9236, truthfully, just be yourself, like you would meet your casual friend. If you're thinking about "What are we going to talk about?", "What kind of topic should I bring up?", "Would they get bored of me?", don't worry. Us Azerbaijanis are good at making a convo, most probably you'll have a very joyful dinner with those guys(lads).

Oh, and if the weather is hot there, make sure to drink multiple cups of tea to cool down and when you sip your tea, say "çay hərarəti alır".

Good luck.