I wrote out a reply with the none girly stuff and prices but accidentally closed the page argh!
So in brief:
Best beach in the area Crystal Bay just up the road
In Lamai it is pretty small so you will be able to walk adn check out yourself but Speed Bar and Pik bar are the two most popular none girly bars. Live band in Speed, whilst Pik is very cheap. AA bar there is also very cheap. The girly bars are a bit shit and I guess you won't be going there with your missus anyway. There aren't an amazing amount of "normal" bars in Lamai. There are a few more on the main road but nothing to get excited about
70 degrees Fahrenheit is an amazing restaurant with fair prices for the food/ambiance. Thai + international
Moonlight for absolutely bargain good Thai food
Dara is pretty solid for Thai food
Vikasa on the way to Chaweng has some amazing views
You can buy weed at a few bars in Lamai if that is your thing, outback and one on the street that runs down to the beach both sold it in rolled joints
Most of the stuff on the beach is pretty crap though food and drink wise IMO.
Other places on Samui that are nice if you have transport are Fishermans beach, great at night there but quite expensive. There are a few decent places in Chaweng, Elephant Beach club is nice during the day with a great view and a few live music bars up there that are a bit of a better standard than most stuff in Lamai.
Green Mango is back open if you want to party all night and have a perv at the freelancers. Talent is actually fairly decent in Chaweng, nothing can compare to pre covid yet for quality and quantity but still pretty good up there.
Prices for girls, I didn't ask, I can't punt around there due to being known but Imagine it has crept up like the rest of Thailand. 2018 was 1000-1500ST but would stick 500 baht on that. Massage and BJ/FS will surely still be doable at 1300-1500 range whilst maybe having to be prepared to pay a bit more for a looker, and there are some if you look. The girls pay 300 baht for a "special"massage to the shop so 1300 can often be the magic price as she gets 1k for her troubles.