Aracosia (multiple locations) is very good - the food is well spiced, but not hot so not sure if that’s what you’re looking for.

Check the Indian restaurant at Pike and Rose.

Budget? You could have a fabulous time at Albi or Rose’s Luxury (both very veggie friendly and have lovely private rooms).

Rania has private rooms.

I don’t recall the food being super spicy but this place has private rooms of varied sizes and the menu has plenty of options that don’t include meat.

https://alabardero.com/private-events

https://alabardero.com/menus

Seasons 52 has nice rooms but nothing spicy

I’m looking for a private room for a special occasion. The guest of honor is vegetarian and likes spicy food. We have done the private room at Rasika and that was very nice, but I’m wondering if there are other equally nice options. Thanks in advance!