I'm not very religious myself, are you a religious person? Do you know anything about the Southern Baptist Convention?
Yes, The Southern Baptist Convention is a denomination of Christianity in the US
Is it one of the bigger denominations or is it just a small niche? I think I've heard of Southern Baptists before, not sure though.
Southern Baptist Convention
The Southern Baptist Convention (SBC) is a Christian denomination based in the United States. It is the world's largest Baptist denomination, the largest Protestant denomination in the United States, and the second-largest Christian denomination in the United States, smaller only than the Catholic Church according to self reported membership statistics (see Christianity in the United States).
The word "Southern" in Southern Baptist Convention stems from it having been organized in 1845 at Augusta, Georgia, by Baptists in the Southern
a member of the World Council of Churches and has about 130,000 members.
The Evangelical Fellowship of Thailand (EFT) is an evangelical umbrella organization that includes many smaller denominations, churches, missionary organizations, and parachurch ministries. It is not a denomination, but a collection of different groups for the purposes of reporting to the government and inter-denominational co-operation. 
The Thailand Baptist Convention is a small denomination of Baptist churches that was started by American missionaries from the Southern Baptist Convention.
There are also many