Bitcoin gambling is already a thing. I ran some research on the topic and very interesting result came out for different locations all around the world. In the forum I found many topics about hosting destinations, discussions about different legislative initiatives all around the world and the bans posed here and there. However gambling legislation and regulations are quite different and often countries which are relatively positive towards BTC have strict bans on any type of gambling or vice-versa. Below is what I have found on the countries of the South-East Asian region:

Often countries form the South-East Asia are regarded as a good location for hosting of a gambling site, because they are relatively distanced from unfriendly destinations like the USA. However you should know that South Asian countries are pretty hostile towards all forms of gambling. In combination with increasing willingness of governments to regulate BTC it becomes less and less appealing to host your site in such location. Local authorities are trying to regulate the process of hosting gambling sites like for example the Philippines where a special zone was created where different rules applied towards IT companies. There are countries like Malaysia where the rage against any form of gambling has lead to raids over offices and server rooms. The chief prosecutor is very aggressive and has declared his will to fight gambling in all forms. However Malaysia remains one of the top destinations to go if you want to host your BTC gambling site, if you at least try to limit the access of locals to your service. Singapore has recently adopted new legislation on the topic which in its essence attempt to regulate gambling without effecting hosting services. However the scope of the law is so bright that a small change in the attitude of the authorities towards the matter may lead to huge disruptions in the sector. Good ol' Hong Kong is always a option to look at. However be very careful not to violate any of the many strict limitations on gambling for local citizens. In general Sout-East Asia remains one of the first destinations to go if you want a secure and quality host for your BTC gambling site, but recent changes in legislation and/or political situations may surprise you if you are not careful enough. Last but not least, always keep in mind the level of the internet services.

I hope you guys like my brief resume and I'll be glad to share and comment more knowledge on the topic with you