El Guapo's

There isn't a dedicated lot. There's a pay lot across the street and street parking is generally available

I do not know. I always use cash at restaurants where I lose control of my credit cards when the wait staff carry my card away to process my payment.

A few options and many items can be ordered as vegetarian. It's Tulsa, not a trendy East or West coast major city so expectations should be lowered when in Oklahoma in general. Although El Guapos makes a conscious effort to cater to a vegetarian diet, understand your surroundings.

Downtown Tulsa

You can just walk in. And go to the top of the restaurant.

Yes

Sorry no help on this one