We booked our first club night for next Saturday and I cannot stop spiralling

ok so. we did the thing. card went through, confirmation email is sitting in my inbox like a little ticking time bomb. saturday 9pm, dress code "smart sexy" whatever that means. I'm 34, dh is 37, married 9 yrs together 13. we've been talking about going to a proper club for like two years tbh, watched the youtube tours, lurked here, did the whole "what if" conversation a million times. and now its actually booked and I'm sat at my desk at work today literally googling "how to not panic at a swingers club" between meetings lol. its not that I dont want to go. I really do. ish. its more like... I have no idea what the etiquette is when you walk in. do you just stand at the bar? do you talk to people? do you wait for them to talk to you? what if no one looks at us. what if EVERYONE looks at us. dh keeps saying "we'll just have a drink and see" which is very on brand for him but its not helping me rn. also we agreed we're just going to watch this time, no play, but I keep wondering if I'll get there and feel pressured or if I'll get there and be the one wanting more and he wont. like we havent really talked about what happens if our wants diverge ON the night. anyway. anyone remember their first club night? did you actually do anything or did you just sit there and stare? did you go home and immediately want to go back? talk me down pls.