Keerati Lodge or LK Metropole
The Thai-Chinese mogul LK who owns practically every piece of land in Pattaya (OK, slight exagerration) has built an entire city block on the corner of Soi Buakao and Soi Diana Inn.The hotel is called LK Metropole, Serviced Residence, has a nice pool with waterfall, Internet, an excellent sauna and steam room and gym. A restaurant is on the premises, never been there, so I don't know whether it is any good.
Next door is Keerati Lodge, also owned by LK for those of the punters who want to stay longer. You can use the hotel facilities as well. Keerati has Wi-Fi capabilities in all rooms. They clean the room, change sheets etc. every other day. Very reasonable rates for the facility.
Both are brand new, check their web sites and negotiate a price.
Downside: Due to the ongoing "finishing touches" it is still noisy, at night before 2.00 a.m. because of the BB's across, in the morning due to the carpenters and tile people.
But excellent location and facilities.
Keerati and Metropole, GF
Oh, I forgot:
They don't care nor charge extra, I guess you could practically bring a donkey home.