Here are some suggestions you might want to ask.
See if they have an elevator for guests that cannot use the stairs.
Ask if you have to pay for the count (number of people coming) you give them before the occasion or the actual number that are there on the day of the wedding.
If you are having a cocktail hour first ask if it is just passed food or
will they have stations where your guests may go up and take what they wish.
Make sure they supply some tables and chairs during the cocktail hour.
See if they have an outdoor space to add a tent just in case you need one.
Ask about what precautions do they have in place because of the virus.
Most important ask about what happens if the venue closes or if there are more restrictions because of the virus.
Will they return your deposit?
Make sure you read the contract very carefully before you sign. All the best. Social Graces wedding planner.