So, assuming that there were two of you, that's an average of £4.25 per drink. That's not wildly expensive these days.
A pint of beer or lager might typically cost between about £3.50 and £4.20, or up to £4.80 for some premium lagers, although there are big variations across different regions and different pub chains.
Spirits with mixers often cost much the same, although cocktails can cost a lot more.
Wine tends to start at around £4.50 per glass but with better quality wines costing around £6.