UDF - Stuck On Simple Logic

I've been working on this off and on for several weeks and I'm to a point in which I'm stuck again. I'm trying to figure out the code in which if the count is greater than 1 for the ogt_code 'Golf Course' then add 1 to the final count.


CREATE FUNCTION [dbo].[ngcoa_get_multi_golf_count] (
@org_cst_key_ext uniqueidentifier,
@todays_date av_date)

RETURNS int AS
BEGIN
declare @ret_value int
declare @ogt_code nvarchar(30)
select @ret_value = 0

select @ret_value = count(*)
FROM
co_customer_x_customer (nolock)
join co_customer (nolock) on cxc_cst_key_2= cst_key
WHERE cxc_cst_key_1= @org_cst_key_ext
and cst_type='Organization'
and (cxc_end_date is null or cxc_end_date>@todays_date)
and cxc_rlt_code = 'Multi-Golf Parent'
and cxc_delete_flag=0
and cst_delete_flag=0

if @ret_value = 0
select @ret_value = 1

select @ogt_code = org_ogt_code
from co_organization (nolock)
where org_cst_key = @org_cst_key_ext

if @ogt_code = 'Supplier'
select @ret_value = 0
if @ogt_code = 'Allied'
select @ret_value = 0
if @ogt_code = 'Hotel/Conference Facility'
select @ret_value = 0
if @ogt_code = 'NGCOA Internal Vendor'
select @ret_value = 0
if @ogt_code = 'USGA Program'
select @ret_value = 0


return @ret_value
END