Hi
I cannot speak for Bangkok, don`t know it.
Also I`m more of a night time person but I don`t see Pattaya being lacking in non bar/drinking activities in the daytime.
ferocious already suggested a route for a long walk, try far end of naklua and take a walk towards Jomtien, that will take some time.
non tourist place, just 1 example, behind the naklua fish market there is a large open air area where many Thais go to relax, there are a few basic exercise machines there free to use if you want.
Exercise classes at 6.00 PM most days, free or 10 baht up to you.
Just watch and listen to the music or participate.
Some people walk around the area, some jog and sometimes some
young Thais who are fixed gear bike enthusiasts come and ride their bikes.
I go there once a week or so to chill out and relax.
Heading towards Jomtien you could always walk or jog up the hill that leads to Buddha hill, then take a walk up the hill leading to the
statues etc.
Then you`ve got at least 2 bowling alleys in Pattaya, 1 very near BigC north on 2nd Road, does a cheap basic breakfast if you`re up early enough.
Go to a gym, fair few in Pattaya
Gym/sauna/Muay Thai/tennis courts all at Fairfax, not the cheapest
but has a good reputation for facilities.
Go play pool or snooker.
Plenty more things to do and IMO there`s simply not enough hours in the day nor days in the week.
