I will be living in Bangkok for the next 5 years, I was thinking about practicing muay thai. Do you know any "normal" gyms where locals train? Because all I can find via internet are freakishly expensive camps, courses, usually intended for tourists.

Would be interested as well. Theres one I hard of for like 5000 bahr per month but it's only like 3 times per week. This is rather expensive. In England you can go every day of the month if you want for only like the equivalent of 2,000 baht. I was planning on learning as well as I don't have to do for the next 10 months.

anything in Pattaya?

Where in Bangkok are you?

There are loads

Ones with with an everyday gym with a decent price?

I'm in Phra Kanong what would go most places near the central area.