I really want to try ordering Indian takeout but I know that cilantro (and coriander) are used in a lot of the spices themselves so I'm not really sure what to do. Any advice would be appreciated!

Also, I was wondering about Indian restaurants in the US in general. India is a huge and diverse country, so there's probably a lot of different culinary traditions there as well. When it comes to Indian restaurants in the US, which cultures tend to be the most represented?