Where can I spend Grin so far?

I spend grin in very easy method. When I go do dentist or talk with person which renovate something for me I ask about pay small part in grin. They say ok. I use service which I discribe in my post Grin Fast send grins to phone, email, keybase etc.etc They need not have node for grin or wallet on computer. I try make it 85 % in fiat currency and 15 % in grin. It works. People don’t want full payment in grin but a small part in easy way for test - say ok.