1.
Answer to raised queries depends upon common trade understanding as well as contractual terms between customer and marriage-hall owner.
Still, kindly allow me to share pointers for ease of decision-making, at your end, after considering common trade understanding as well as contractual terms etc.:
A. Based on common trade understanding, if subject '2' services provided falls under 'composite supply', then, applicable rate of tax will be 'tax as applicable for principal supply' on entire consideration (i.e. irrespective of the fact that there are two separate prices specified for two elements of supply or if same is at single price).
B. Where the consideration for entire contract is at single price and based on common trade understanding, such '2' services provided falls under 'mixed supply', then, applicable rate of tax will be for 'supply - among these 2 supplies - which attracts the highest rate of tax'.
C. If there are two separate consideration - which is independent of each other - for each of two services and based on common trade understanding, both these supplies - in conjunction of each other - does not fall under 'composite supply', then applicable tax-rate will be 'separate' for two services and 'independent' of each other. In other words, in this case, there will be 2 different supplies.
These are ex facie views of mine and the same should not be construed as professional advice / suggestion.